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As a double board-certified physician, William T. Long, MD, FAAD, is a trusted expert in all aspects of dermatology. With over three decades in practice, Dr. Long is an in-demand practitioner at Manhattan Dermatology’s two locations in Murray Hill and Midtown East, New York City.

After earning his doctor of medicine degree from Georgetown University School of Medicine in Washington, DC, Dr. Long relocated to New York City for his postgraduate training. He went through both his internship and internal medicine residency at Mount Sinai Hospital. Dr. Long completed a second residency, specializing in dermatology, at the New York University (NYU) Langone Medical Center, which is one of the premier dermatology programs in the United States.

To ensure he’s always up-to-date in the latest medical advancements, Dr. Long maintains his fellowship with the American Academy of Dermatology, as well as his membership with the American Society for Dermatologic Surgery. Dr. Long is board certified through the American Board of Internal Medicine and the American Board of Dermatology.

When Dr. Long is away from the clinic, he teaches residents and medical students at the NYU School of Medicine. He’s served as a professor at NYU for over 30 years. Dr. Long’s daughter, Dr. Wendy Long, works alongside him at the clinic.

Additional Testimonials

As a board-certified physician and fellowship-trained Mohs micrographic surgeon, Wendy Long Mitchell, MD, FAAD, FACMS, is a leader in the field of dermatology. Dr. Wendy Long offers preventive care and comprehensive treatments at Manhattan Dermatology’s two locations in Murray Hill and Midtown East, New York City.

Being raised by a dermatologist — her father, William T. Long, FD, FAAD, also works at the clinic — Dr. Wendy Long knew she would follow in her father’s footsteps. After graduating from the Honors College at the University of Michigan with Phi Beta Kappa National Honor Society membership, Dr. Wendy Long was accepted into medical school.

She earned her doctor of medicine degree from New York University (NYU). During medical school, Dr. Wendy Long published the public education book entitled “Coping with Melanoma and Other Skin Cancers.”

Dr. Wendy Long went on to finish an internal medicine internship, followed up by a dermatology residency at the University of Michigan. Throughout her residency, she was an integral part of the treatment of melanomas, from diagnosis through treatment, in one of the largest multidisciplinary melanoma care centers in the world.

Shortly after completing her residency, Dr. Wendy Long was accepted into a prestigious fellowship program in Mohs micrographic surgery and cosmetic laser surgery. This advanced training allows Dr. Wendy Long to provide the highest cure rate in treating skin cancer while achieving optimal aesthetic results.

Dr. Wendy Long currently serves as a clinical assistant professor at NYU’s Langone Medical Center, which is one of the premier dermatology programs in the United States. She’s a fellow of the American Academy of Dermatology and a member of the American Society for Dermatologic Surgery. Dr. Wendy Long is also board certified by the American Board of Internal Medicine.

Additional Testimonials

Dr. Gilman is often consulted by local and national print and television media for her expert opinion on medical advancements in dermatology and new aesthetic trends and procedures. She has appeared on MSNBC, Fox News, and the Dr. Oz Show and has been quoted in numerous regional and national publications.

Taking an individual approach with every patient, Dr. Gilman integrates each person’s needs in the context of his or her life and lifestyle. Dr. Gilman is known for her artistic eye and meticulous attention to detail, which allows her to provide her patients with natural-looking results. With a thorough understanding of the complex processes involved in skin aging and the numerous treatments available on the market today, Dr. Gilman customizes treatments for each individual patient. 

Dr. Gilman is looking forward to returning to her native New York City. She enjoys spending time with family, French language, reading, and fitness. 

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We are happy to welcome Michelle Levy, MD to Manhattan Dermatology. She is a board-certified dermatologist who specializes in medical, cosmetic and surgical dermatology, and treats both adults and children.

Dr. Levy is originally from Toronto, Canada. She completed both her medical training and dermatology residency at the University of Toronto, graduating with honors. During her schooling and dermatology training, Dr. Levy was the recipient of numerous awards for both academic excellence and for research and was selected by her program to serve as Chief Resident during her final year of training.

In addition to her residency, Dr. Levy has received advanced training in the non-invasive diagnosis of skin cancer from Memorial Sloan Kettering Cancer Center. She is board-certified by both the American Board of Dermatology and the Royal College of Physicians and Surgeons of Canada.

Dr. Levy is a sought-after speaker and educator and has taught dermatology to many physicians in training. As part of her commitment to education, she serves as a clinical instructor at NYU’s Department of Dermatology. Dr. Levy’s interests include skin cancer detection and the treatment of acne and psoriasis.

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As a double board-certified physician, William T. Long, MD, FAAD, is a trusted expert in all aspects of dermatology. With over three decades in practice, Dr. Long is an in-demand practitioner at Manhattan Dermatology’s two locations in Murray Hill and Midtown East, New York City.

After earning his doctor of medicine degree from Georgetown University School of Medicine in Washington, DC, Dr. Long relocated to New York City for his postgraduate training. He went through both his internship and internal medicine residency at Mount Sinai Hospital. Dr. Long completed a second residency, specializing in dermatology, at the New York University (NYU) Langone Medical Center, which is one of the premier dermatology programs in the United States.

To ensure he’s always up-to-date in the latest medical advancements, Dr. Long maintains his fellowship with the American Academy of Dermatology, as well as his membership with the American Society for Dermatologic Surgery. Dr. Long is board certified through the American Board of Internal Medicine and the American Board of Dermatology.

When Dr. Long is away from the clinic, he teaches residents and medical students at the NYU School of Medicine. He’s served as a professor at NYU for over 30 years. Dr. Long’s daughter, Dr. Wendy Long, works alongside him at the clinic.

Additional Testimonials

As a board-certified physician and fellowship-trained Mohs micrographic surgeon, Wendy Long Mitchell, MD, FAAD, FACMS, is a leader in the field of dermatology. Dr. Wendy Long offers preventive care and comprehensive treatments at Manhattan Dermatology’s two locations in Murray Hill and Midtown East, New York City.

Being raised by a dermatologist — her father, William T. Long, FD, FAAD, also works at the clinic — Dr. Wendy Long knew she would follow in her father’s footsteps. After graduating from the Honors College at the University of Michigan with Phi Beta Kappa National Honor Society membership, Dr. Wendy Long was accepted into medical school.

She earned her doctor of medicine degree from New York University (NYU). During medical school, Dr. Wendy Long published the public education book entitled “Coping with Melanoma and Other Skin Cancers.”

Dr. Wendy Long went on to finish an internal medicine internship, followed up by a dermatology residency at the University of Michigan. Throughout her residency, she was an integral part of the treatment of melanomas, from diagnosis through treatment, in one of the largest multidisciplinary melanoma care centers in the world.

Shortly after completing her residency, Dr. Wendy Long was accepted into a prestigious fellowship program in Mohs micrographic surgery and cosmetic laser surgery. This advanced training allows Dr. Wendy Long to provide the highest cure rate in treating skin cancer while achieving optimal aesthetic results.

Dr. Wendy Long currently serves as a clinical assistant professor at NYU’s Langone Medical Center, which is one of the premier dermatology programs in the United States. She’s a fellow of the American Academy of Dermatology and a member of the American Society for Dermatologic Surgery. Dr. Wendy Long is also board certified by the American Board of Internal Medicine.

Additional Testimonials

Sydney Coscia is a dedicated Physician Assistant specializing in dermatology. Sydney earned her Master of Science in Physician Assistant (MSPA) degree from St. John’s University in June 2024, where she built a strong clinical foundation and a deep commitment to patient-centered care.

Her passion for dermatology grew from a desire to help patients feel confident in their own skin, addressing both medical and cosmetic concerns with compassion and expertise. Sydney is particularly drawn to the field’s unique combination of procedural work and long-term patient relationships, which allows her to witness meaningful, lasting improvements in her patients’ health and well-being.

To further her dedication and expertise, Sydney is completing a dermatology fellowship through the Society of Dermatology Physician Assistants (SDPA). She remains committed to continuous learning and providing high-quality, evidence-based care. Known for her approachable demeanor, attentiveness, and warm bedside manner, Sydney is a valued member of our team and is well-respected by her patients.

Angela Azar, MD, is a skilled and practiced Board-Certified Dermatologist specializing in Aesthetic Dermatology and Pediatric and Adult Dermatology at Angela Azar, MD. Dr. Azar leads her self-named dermatology practice, providing outstanding care for all patients in Great Neck and Jackson Heights, New York.

Education and learning have always been of importance to Dr. Azar. In 1996 she received her Medical Degree from Mount Sinai School of Medicine, now called Icahn School of Medicine at Mount Sinai, located in New York City, New York. 

From 1997 to 2000, Dr. Azar completed an Internship at Montefiore Medical Center (Montefiore Hospital) in the Bronx, New York, and a Dermatology Residency at NY Medical College (NYMC) in Valhalla, New York.

Dr. Azar is a talented Adult and Pediatric Dermatologist and Cosmetic Surgeon who obtained Board Certification from the American Board of Dermatology (ABD). She is affiliated with North Shore University Hospital in Manhasset, New York, and NY Columbia Presbyterian Hospital in Manhattan.

She has been practicing since 2000, giving her years of experience in the field of Cosmetic and Medical Dermatology. 

Dr. Azar and her team specialize in treating a variety of skin disorders, including alopecia and various types of hair loss. She is also skilled in treating skin cancer and performing earlobe repair.

Request a consultation today by calling Angela Azar, MD. Or use the convenient online booking system today.

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Sherry H. Hsiung, MD, is a board-certified dermatologic surgeon at the Skin Institute of New York (SINY®). Dr. Hsiung also practices general and cosmetic dermatology at SINY’s® three New York City–area offices, in the city’s West Village and in the Bay Ridge and Park Slope areas of Brooklyn, New York.

At the Massachusetts Institute of Technology in Cambridge, Massachusetts, Dr. Hsiung earned undergraduate degrees in both biology and chemical engineering, graduating with honors. While earning her medical degree from the University of Pennsylvania Medical School in Philadelphia, she was a member of the prestigious Alpha Omega Alpha Honor Medical Society. She then completed her residency in dermatology at New York University School of Medicine in New York City, serving as chief resident.

Dr. Hsiung retains active memberships in the American Academy of Dermatology and the American Society of Dermatologic Surgery, and she has lectured on dermatology topics at local and national conferences. She serves as a medical editor for the Journal of Drugs in Dermatology and is a consultant for the Kiehl’s Dermatology Advisory Board.

As a crucial part of the SINY® medical team, Dr. Hsiung specializes in Mohs Micrographic Surgery, a surgical technique used to treat skin cancer, focused on removing all of the cancer cells while preserving the healthy tissue in sensitive areas such as the face, hands, feet or genitals. She completed a prestigious fellowship in Mohs surgery with Dr. Perry Robins at NYU, and she is an active member of the American College of Mohs Surgery. Dr. Hsiung’s surgical expertise ranges from the simplest excisions to the most extensive skin cancer surgeries and repairs.

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Dr. Ezra Hazan is a board certified dermatologist and fellowship trained Mohs surgeon. He graduated with honors from Jefferson Medical College in Philadelphia, PA. Dr. Hazan went on to do an internship in internal medicine at Maimonides Medical Center in Brooklyn, NY. He then completed his dermatology residency at Thomas Jefferson University Hospital and fellowship in Mohs micrographic surgery and cosmetic dermatology at Mount Sinai Hospital. There he gained extensive knowledge and experience in procedural dermatology, including surgery of the skin as well as advanced cosmetic procedures like injectables, lasers and light based technologies.

Dr. Hazan is on staff at Mount Sinai Hospital, where he helps train dermatology residents, and at Penn Medicine Princeton Medical Center. He has published many academic journal articles and authored multiple textbook chapters on various topics in the field of dermatology. Dr. Hazan is a member of the American Academy of Dermatology, American Society for Dermatologic Surgery and American College of Mohs Surgery. He is passionate about the management and treatment of skin cancers, as well as cosmetic treatments and general dermatologic conditions. He strives to provide personalized quality care to all of his patients.

Dr. Regina Zambrano DiFiore, DO

Board-Certified Dermatologist | Medical, Pediatric & Cosmetic Dermatology

Dr. Regina Zambrano DiFiore is a board-certified dermatologist at the Skin Institute of New York (SINY®), providing comprehensive dermatologic care at the Massapequa, Long Island location. Born and raised on the South Shore of Long Island, Dr. Zambrano DiFiore is proud to serve the community she calls home, caring for patients of all ages with a compassionate, highly personalized approach.

She is trained in medical, pediatric, and cosmetic dermatology, with advanced experience treating all skin types. Patients appreciate her thorough evaluations, clear communication, and commitment to developing treatment plans that align with each individual’s needs and goals.

Schedule an Appointment with Dr. Zambrano DiFiore

Education & Training

Dr. Zambrano DiFiore’s academic excellence and leadership background reflect her dedication to high-quality, evidence-based dermatologic care:

• Bachelor of Science in Biology (Honors) – Stony Brook University
  Specialization: Developmental Genetics
• Doctor of Osteopathic Medicine (DO) – Nova Southeastern University, Fort Lauderdale, FL
• Master of Public Health (MPH) – Nova Southeastern University
• Internship & Dermatology Residency – St. John’s Episcopal Hospital
  Chief Resident, Final Year

Her dual medical and public health training allows Dr. Zambrano DiFiore to approach dermatology with a broad, patient-centered perspective that emphasizes both treatment and long-term skin health.

Clinical Expertise & Special Interests

Dr. Zambrano DiFiore provides comprehensive care for conditions affecting the skin, hair, and nails, including both common and complex dermatologic concerns. Her areas of focus include:

• Medical dermatology for acute and chronic skin conditions
• Pediatric dermatology
• Skin cancer screening and early detection
• Hair and scalp disorders
• Nail conditions
• Cosmetic dermatology, including:
• Neurotoxins (Botox® and similar treatments)
• Dermal fillers

With a thoughtful, minimalistic approach to aesthetics, she focuses on enhancing her patients’ natural beauty—creating treatment plans that are subtle, balanced, and tailored to individual goals. Her philosophy centers on helping patients look refreshed, confident, and like the best version of themselves.

Patient-Centered Philosophy

Dr. Zambrano DiFiore is deeply committed to building long-term relationships with her patients. She strives to create an approachable, supportive environment where patients feel heard, respected, and actively involved in their care.

She is passionate about patient education, empowering individuals to understand their conditions and treatment options so they can confidently participate in their dermatologic journey. Dr. Zambrano DiFiore remains actively engaged with the latest advancements in dermatology to ensure her patients receive safe, effective, and innovative care.

Patient Experience & Satisfaction

Patients consistently describe Dr. Zambrano DiFiore as attentive, knowledgeable, and genuinely caring. Many highlight her ability to listen closely, explain treatment options clearly, and follow up personally to ensure optimal outcomes.

Convenient Location in Long Island

Dr. Zambrano DiFiore sees patients at the SINY Dermatology Massapequa office, serving families and individuals throughout the South Shore of Long Island.

Massapequa, Long Island

83A Grand Ave, Massapequa, NY 11758

Phone: 800-778-3090

Hours:

• Mon, Thu & Fri: 9:00 AM – 5:00 PM
• Tue: 12:00 PM – 8:00 PM
• Wed: Closed
• Sat: By appointment
• Sun: Closed

Serving patients from: Massapequa, Massapequa Park, Seaford, Wantagh, Bellmore, Amityville, Farmingdale, and surrounding Long Island communities.

Schedule an Appointment at Massapequa

Accepted Insurance Plans

Dr. Zambrano DiFiore accepts many major insurance plans commonly used throughout Long Island and New York, including:

• Aetna
• Anthem Blue Cross Blue Shield / Empire Blue Cross Blue Shield
• Blue Cross Blue Shield
• Cigna & Cigna-HealthSpring
• UnitedHealthcare & Oxford
• EmblemHealth (GHI)
• Healthfirst (NY)
• Medicare
• Humana
• Fidelis Care (NY)
• AvMed
• 1199SEIU
• Multiplan PHCS

Additional plans may be accepted. Please contact SINY Dermatology to confirm coverage prior to your visit.

About SINY Dermatology (Skin Institute of New York)

The Skin Institute of New York (SINY®) is a leading dermatology group providing medical, surgical, and cosmetic dermatology services across New York. SINY Dermatology physicians combine academic excellence, advanced clinical training, and patient-focused care to deliver high-quality, individualized treatment for every patient.

Dr. Sydney Liang, MD

Board-Certified Dermatologist | Upper East Side, NYC

Dr. Sydney Liang, MD, is a board-certified dermatologist and Fellow of the American Academy of Dermatology. She specializes in medical, cosmetic, and surgical dermatology, delivering compassionate, high-quality, and patient-centered care to patients in Manhattan’s Upper East Side and throughout New York City.

Dr. Liang combines academic excellence, surgical precision, and aesthetic artistry to help patients achieve healthy skin and natural-looking cosmetic results.

Schedule an Appointment with Dr. Liang

Education & Academic Distinction

Dr. Liang’s academic background reflects exceptional achievement and dedication to excellence.

She completed her undergraduate degrees in cell biology, genetics, and human development at the University of Maryland, graduating summa cum laude and earning early acceptance to the Phi Beta Kappa Honor Society as a junior.

She earned her medical degree from the New York University School of Medicine, where she was elected to the prestigious Alpha Omega Alpha Medical Honor Society and graduated at the top of her class.

Dr. Liang completed her dermatology residency at the NYU Langone Health, within the Ronald O. Perelman Department of Dermatology. During residency, she received multiple awards for academic excellence, leadership, and research, culminating in the Morris Leider MD Award for “Best All-Around Resident.”

Her commitment to ongoing education ensures patients receive the most current, cutting-edge, and evidence-based dermatologic treatments available.

Dermatologic Expertise & Special Interests

Dr. Liang provides comprehensive care for conditions of the skin, hair, and nails, with particular expertise in:

Skin Cancer Prevention & Surgical Management

• Skin cancer screenings
• Early detection and prevention
• Surgical treatment of skin cancers
• Precision excisions

Medical Dermatology

• Acne and acne scarring
• Rosacea
• Psoriasis
• Complex inflammatory skin disorders

Cosmetic Dermatology

• Cosmetic injectables (neuromodulators and fillers)
• Laser treatments
• Skin resurfacing procedures
• Personalized aesthetic treatment planning

Her approach emphasizes safety, evidence-based medicine, and treatments tailored to each patient’s unique goals and skin type.

Academic Leadership & Research

In addition to treating patients at SINY®, Dr. Liang teaches future dermatologists at New York University School of Medicine. She has presented at numerous regional and national dermatology conferences and has authored scholarly publications in leading dermatology journals.

Her dedication to advancing dermatologic science reinforces her commitment to delivering exceptional patient care.

Patient Experience & Satisfaction

Dr. Liang places patients at the forefront of every visit. Known for her empathetic demeanor and exceptional communication skills, she creates a comfortable environment where patients feel heard and respected.

Practice Location

Upper East Side

69 E 76th St, New York, NY 10021

Phone: 800-778-3090

Hours:

• Mon: 9:00 AM – 5:00 PM
• Tue-Thu: 9:00 AM – 8:00 PM
• ri: 8:00 AM – 4:00 PM
• Sat-Sun: Closed

Serving patients from: Upper East Side, Lenox Hill, Carnegie Hill, Yorkville, Midtown East, Roosevelt Island, Upper West Side, East Harlem, and surrounding Manhattan communities.

Accepted Insurance Plans

Dr. Liang participates with many major insurance plans, including:

• Aetna
• Blue Cross Blue Shield (including Empire BCBS)
• Cigna
• EmblemHealth
• HealthFirst (NY)
• UnitedHealthcare
• Oscar Health
• Medicare
• 1199SEIU
• Multiplan PHCS
• Fidelis Care

For specific plan verification, patients are encouraged to contact the office directly.

About SINY Dermatology (Skin Institute of New York)

The Skin Institute of New York is a leading dermatology group providing medical, surgical, and cosmetic dermatology services across New York. SINY Dermatology physicians combine academic excellence, clinical research, and patient-focused care to deliver advanced skin treatments tailored to each individual.

Board-Certified Dermatologist | Medical, Surgical & Cosmetic Dermatology

Dr. Aurash Bina is a board-certified dermatologist at the Skin Institute of New York (SINY®) specializing in medical dermatology, skin cancer screening and prevention, and cosmetic dermatology. Known for his attentive bedside manner and thorough diagnostic approach, Dr. Bina is dedicated to delivering high-quality, patient-centered dermatologic care.

Dr. Bina believes that effective dermatology care begins with listening. He prioritizes patient education and personalized treatment plans, helping individuals understand their skin conditions and empowering them to make informed decisions about their care.

In addition to treating a wide range of medical dermatology conditions, Dr. Bina also provides cosmetic dermatology treatments designed to enhance skin health, appearance, and patient confidence.

Schedule an Appointment with Dr. Bina

Education & Training

Dr. Bina’s training reflects a strong foundation in dermatology and patient-centered clinical care.

• Bachelor of Science – University of Texas at Austin
• Doctor of Osteopathic Medicine (DO) – Touro University California College of Osteopathic Medicine
• Medical Internship – St. John's Episcopal Hospital, Queens, New York
• Dermatology Residency – St. John's Episcopal Hospital

During residency, Dr. Bina’s clinical excellence and leadership led to his appointment as Chief Dermatology Resident, where he gained extensive experience diagnosing and managing a wide range of skin conditions.

Dermatology Expertise

Dr. Bina treats patients with a wide variety of dermatologic concerns affecting the skin, hair, and nails.

His clinical interests include:

• Skin cancer screening and prevention
• Acne and inflammatory skin conditions
• Eczema and psoriasis
• Rosacea and chronic skin irritation
• Skin infections and rashes
• Hair and scalp disorders
• Preventative skin care and long-term skin health

Dr. Bina’s comprehensive approach focuses not only on treating current symptoms but also on preventing future skin concerns and maintaining long-term skin health.

Cosmetic Dermatology

In addition to medical dermatology, Dr. Bina offers advanced cosmetic dermatology treatments to help patients look and feel their best.

Services may include:

• Injectable treatments such as Botox® and dermal fillers
• Laser skin treatments
• Skin rejuvenation procedures
• Treatment for sun damage and uneven skin tone

By combining aesthetic treatments with medical dermatology expertise, Dr. Bina helps patients achieve both healthy and confident skin.

Commitment to Dermatology Advancement

Dr. Bina remains committed to staying current with the latest dermatology research, technologies, and treatment methods.

He regularly participates in continuing education and contributes to the dermatology community through clinical presentations and collaborative research efforts, helping advance the understanding of dermatologic care and treatment.

Patient Experience & Satisfaction

Patients consistently describe Dr. Bina as attentive, compassionate, and thorough. He takes the time to understand each patient’s concerns and explain treatment options clearly. Dr. Bina believes that building trust and open communication with patients is essential to successful dermatologic care.

Convenient Dermatology Locations in Brooklyn

Dr. Bina sees patients at two SINY Dermatology offices in Brooklyn.

Bay Ridge

7901 4th Ave Brooklyn, NY 11209

Phone: 800-778-3090

Hours:

• Mon–Thu: 9:00 AM – 8:00 PM
• Fri: 9:00 AM – 6:30 PM
• Sat: 9:00 AM – 3:00 PM
• Sun: 9:00 AM – 2:00 PM

Serving patients from: Bay Ridge, Dyker Heights, Bensonhurst, Sunset Park, Fort Hamilton, Staten Island, and surrounding South Brooklyn communities.

Schedule an Appointment in Bay Ridge

Williamsburg

395 Graham Ave Brooklyn, NY 11211

Phone: 800-778-3090

Hours:

• Mon: 9:00 AM – 6:00 PM
• Tue: 11:00 AM – 7:00 PM
• Wed: 9:00 AM – 8:00 PM
• Thu–Fri: 9:00 AM – 5:00 PM
• Sat: 10:00 AM – 3:00 PM
• Sun: Closed

Serving patients from: Williamsburg, Greenpoint, Bushwick, Bedford-Stuyvesant, East Williamsburg, and surrounding North Brooklyn neighborhoods.

Schedule an Appointment in Williamsburg

Accepted Insurance Plans

Dr. Bina accepts many widely used insurance plans across New York, including:

• Aetna
• Anthem Blue Cross Blue Shield / Empire Blue Cross Blue Shield
• Blue Cross Blue Shield
• Cigna
• UnitedHealthcare and Oxford
• EmblemHealth (GHI / HIP)
• Healthfirst (NY)
• Medicare
• Fidelis Care (NY)
• MetroPlus Health Plan
• MagnaCare
• 1199SEIU

Patients are encouraged to confirm coverage with the office prior to their appointment.

About SINY Dermatology (Skin Institute of New York)

The Skin Institute of New York (SINY®) is a leading dermatology group providing medical, surgical, and cosmetic dermatology services across New York City and Long Island. SINY physicians combine advanced clinical training, academic excellence, and patient-centered care to deliver individualized, evidence-based treatment for every patient.

Dr. Sergey Petrosian, DO

Board-Certified Dermatologist | Medical & Pediatric Dermatology

Dr. Sergey Petrosian is a board-certified dermatologist at the Skin Institute of New York (SINY®), providing comprehensive dermatologic care to adult and pediatric patients across Brooklyn and Manhattan. A native New Yorker who grew up in Queens, Dr. Petrosian is deeply connected to the communities he serves in Park Slope, Bay Ridge, and the Upper East Side

Known for his thorough evaluations, attentive bedside manner, and patient-centered treatment plans, Dr. Petrosian is committed to delivering evidence-based dermatologic care in a welcoming, professional environment.

Schedule an Appointment with Dr. Petrosian

Education & Training

Dr. Petrosian’s academic and medical training reflect strong New York roots and rigorous clinical preparation:

• Graduate of Brooklyn Technical High School
• Bachelor of Science – University of Medicine and Dentistry of New Jersey
• Dermatology Residency (Chief Resident) – Stony Brook University
• Doctor of Osteopathic Medicine (DO) – New York Institute of Technology College of Osteopathic Medicine (formerly NYCOM)
• Dermatology Residency – St. John's Episcopal Hospital, affiliated with Lake Erie College of Osteopathic Medicine

His residency training provided comprehensive experience in medical dermatology, procedural dermatology, and the management of complex skin conditions across diverse patient populations

Clinical Expertise & Special Interests

Dr. Petrosian treats both adult and pediatric patients and provides care for a wide range of dermatologic conditions, including:

• Acne and inflammatory skin conditions
• Eczema and psoriasis
• Skin cancer screenings and lesion evaluation
• Pediatric dermatology
• General medical dermatology
• Preventative skin care

Patients consistently note his ability to listen carefully, thoroughly explain diagnoses, and create structured treatment plans that lead to measurable improvement.

Patient Experience & Satisfaction

Patients frequently describe Dr. Petrosian as kind, knowledgeable, and exceptionally thorough. Many appreciate that he takes the time to address concerns in detail and follows up thoughtfully to ensure progress and symptom improvement.

Convenient Locations in New York

Dr. Petrosian sees patients at SINY Dermatology offices in Brooklyn and Manhattan.

Park Slope, Brooklyn

76 7th Ave, Brooklyn, NY 11217

Phone:800-778-3090

Hours:

• Mon–Tue: 9:00 AM – 8:00 PM
• Wed–Thu: 8:00 AM – 8:00 PM
• Fri: 9:00 AM – 7:00 PM
• Sat: 9:00 AM – 5:00 PM
• Sun: 10:00 AM – 3:00 PM

Serving patients from: Park Slope, Prospect Heights, Gowanus, Boerum Hill, Cobble Hill, Carroll Gardens, Windsor Terrace, Sunset Park, and surrounding Brooklyn communities.

Schedule an Appointment at Park Slope

Upper East Side

69 E 76th St, New York, NY 10021

Phone: 800-778-3090

Hours:

• Mon: 9:00 AM – 5:00 PM
• Tue–Thu: 9:00 AM – 8:00 PM
• Fri: 8:00 AM – 4:00 PM
• Sat–Sun: Closed

Serving patients from: Upper East Side, Lenox Hill, Carnegie Hill, Yorkville, Midtown East, Roosevelt Island, Upper West Side, East Harlem, and surrounding Manhattan communities.

Schedule an Appointment on the Upper East Side

Accepted Insurance Plans

Dr. Petrosian accepts a wide range of major insurance plans, including:

• Aetna
• Anthem Blue Cross Blue Shield / Empire Blue Cross Blue Shield
• Blue Cross Blue Shield
• Cigna & Cigna-HealthSpring
• UnitedHealthcare & Oxford
• EmblemHealth (GHI / HIP)
• Healthfirst (NY)
• Medicare
• Fidelis Care (NY)
• Humana
• MagnaCare
• Meritain Health
• Multiplan PHCS
• Oscar Health
• 1199SEIU
• Surest Health Plans
• Regence Blue Cross Blue Shield

Additional plans accepted. Patients are encouraged to confirm coverage prior to scheduling.

About SINY Dermatology (Skin Institute of New York)

The Skin Institute of New York is a leading dermatology group providing medical, surgical, and cosmetic dermatology services across New York. SINY Dermatology physicians combine academic excellence, clinical research, and patient-focused care to deliver advanced skin treatments tailored to each individual.

Dr. Costner McKenzie, MD

Board-Certified Dermatologist | Medical, Pediatric & Cosmetic Dermatology Specialist

Dr. Costner McKenzie is a board-certified dermatologist at the Skin Institute of New York (SINY®), providing comprehensive dermatologic care to adult and pediatric patients in Manhattan. With expertise in both medical and cosmetic dermatology, Dr. McKenzie combines academic excellence, research leadership, and compassionate patient care to deliver individualized, evidence-based treatment plans.

Schedule an Appointment with Dr. McKenzie

Education & Training

Dr. McKenzie’s academic and clinical training reflect a deep commitment to excellence:

• Bachelor’s Degree in Human Biology – Stanford University
• Doctor of Medicine (MD) – Northwestern University Feinberg School of Medicine
• Inducted into the prestigious Alpha Omega Alpha Honor Medical Society
• Dermatology Residency (Chief Resident) – New York University

At Northwestern, Dr. McKenzie’s academic performance and dedication to medicine earned him membership in Alpha Omega Alpha, recognizing exceptional academic achievement and professionalism. During residency at NYU, he refined his diagnostic, surgical, and cosmetic skills under nationally recognized leaders in dermatology and served as Chief Resident in his final year.

Clinical Expertise & Special Interests

Dr. McKenzie provides comprehensive dermatologic care with special focus on:

• Eczema and inflammatory skin disorders
• Acne and acne scarring
• Hair loss and scalp conditions
• Skin cancer screening and prevention
• Cosmetic dermatology and injectables
• Pediatric dermatology

His clinical and research interests also include health disparities in dermatology, reflecting his commitment to equitable and inclusive skin care for patients of all backgrounds

Dr. McKenzie is known for combining scientific rigor with a highly personalized approach, ensuring each patient feels heard, supported, and confident in their treatment plan.

Research, Publications & Academic Leadership

Dr. McKenzie is a well-published author with research featured in respected dermatology journals. He has presented his work at national and international meetings, contributing to advancements in the understanding and treatment of eczema, acne, hair loss, and dermatologic health disparities

He remains actively involved in medical education and is committed to mentoring and training future dermatologists.

• Active Member, American Academy of Dermatology
• Contributor to peer-reviewed dermatology literature
• National and international presenter

Patient Experience & Satisfaction

Patients consistently describe Dr. McKenzie as personable, knowledgeable, and exceptionally attentive. Many highlight his outstanding bedside manner, noting that they never feel rushed and always feel fully heard. He is frequently praised for clearly explaining diagnoses and treatment options, providing structured care plans, and ensuring patients leave feeling confident and informed.

Patients also commend the professionalism and friendliness of the SINY team, efficient scheduling, and welcoming office environment

Patient Experience & Satisfaction

Patients consistently describe Dr. McKenzie as personable, knowledgeable, and exceptionally attentive. Many highlight his outstanding bedside manner, noting that they never feel rushed and always feel fully heard. He is frequently praised for clearly explaining diagnoses and treatment options, providing structured care plans, and ensuring patients leave feeling confident and informed.

Patients also commend the professionalism and friendliness of the SINY team, efficient scheduling, and welcoming office environment.

Convenient Locations in New York

Dr. McKenzie sees patients at two SINY Dermatology locations in Manhattan, offering convenient access to expert dermatologic care.

Upper East Side

69 E 76th St, New York, NY 10021

Phone: 800-778-3090

Hours:

• Mon: 9:00 AM – 5:00 PM
• Tue-Thu: 9:00 AM – 8:00 PM
• ri: 8:00 AM – 4:00 PM
• Sat-Sun: Closed

Serving patients from: Upper East Side, Lenox Hill, Carnegie Hill, Yorkville, Midtown East, Roosevelt Island, Upper West Side, East Harlem, and surrounding Manhattan communities.

Schedule an Appointment at Upper East Side

Park Avenue

1000 Park Ave, New York, NY 10028

Phone:800-778-3090

Hours:

• on-Tue: 9:00 AM – 5:00 PM
• Wed: 12:00 PM – 8:00 PM
• Thu: 9:00 AM – 5:00 PM
• Fri: Closed
• Sat: 10:00 AM – 3:00 PM
• Sun: Closed

Serving patients from: Upper East Side, Carnegie Hill, Lenox Hill, Yorkville, Midtown East, Central Park East, and surrounding Manhattan neighborhoods.

Schedule an Appointment at Park Avenue

Accepted Insurance Plans

Dr. McKenzie accepts a wide range of major insurance plans, including:

• Aetna
• Anthem Blue Cross Blue Shield / Empire Blue Cross Blue Shield
• Blue Cross Blue Shield (including Federal Employee Program)
• Cigna & Cigna-HealthSpring
• UnitedHealthcare & Oxford
• EmblemHealth (GHI)
• Healthfirst (NY)
• Medicare
• Fidelis Care (NY)
• Humana
• Oscar Health
• MetroPlus Health Plan
• MagnaCare
• 1199SEIU

Additional plans accepted. Patients are encouraged to contact SINY Dermatology to confirm coverage prior to their visit.

About SINY Dermatology (Skin Institute of New York)

The Skin Institute of New York is a leading dermatology group providing medical, surgical, and cosmetic dermatology services across New York. SINY Dermatology physicians combine academic excellence, clinical research, and patient-focused care to deliver advanced skin treatments tailored to each individual.

Board-Certified Dermatologist | Medical & Cosmetic Dermatology

Lisa M. Gruson is a board-certified dermatologist at the Skin Institute of New York (SINY®), where she specializes in medical dermatology, cosmetic dermatology, and advanced laser procedures. She treats adult patients across multiple SINY® locations in New York City and Brooklyn.

Dr. Gruson is known for her thorough approach, clear communication, and patient-focused care, helping patients achieve healthier skin through personalized treatment plans. She has particular expertise in skin allergies and contact dermatitis, along with the diagnosis and management of a wide range of skin conditions.

Patients appreciate her ability to explain treatment options clearly and take the time to answer questions, ensuring every patient feels confident in their care.

Schedule an Appointment with Dr. Gruson

Education & Training

Dr. Gruson completed her undergraduate studies at the University of Michigan in Ann Arbor, graduating with Phi Beta Kappa honors.

She went on to earn her medical degree from the NYU Grossman School of Medicine, where she received the prestigious Marion B. Sulzberger Dermatology Award and was inducted into the Alpha Omega Alpha Honor Medical Society.

Dr. Gruson completed her dermatology residency at NYU Medical Center, serving as Chief Resident and receiving the Morris Leider Award for Excellence in Dermatology.

Academic & Professional Leadership

In addition to her clinical work, Dr. Gruson is a Clinical Assistant Professor of Dermatology at NYU School of Medicine, where she teaches dermatology residents and mentors medical students considering careers in dermatology.

She is a Fellow of the American Academy of Dermatology and an active member of several professional organizations, including:

• New York State Medical Society
• American Contact Dermatitis Society
• Dermatologic Society of Greater New York

Dr. Gruson has also conducted dermatology research and published scholarly articles, particularly focused on skin allergies and contact dermatitis, and has presented her work at national dermatology conferences.

Clinical Expertise

Dr. Gruson provides comprehensive dermatology care, including:

Medical Dermatology

• Acne and acne scarring
• Eczema and dermatitis
• Psoriasis
• Skin allergy testing and treatment
• Skin infections
• Skin cancer screenings and evaluation of suspicious moles

Cosmetic Dermatology

• Laser skin treatments
• Skin rejuvenation procedures
• Treatment for sun damage and pigmentation concerns

Patient Experience & Satisfaction

Patients consistently praise Lisa M. Gruson for her thorough, attentive approach and clear communication. Many patients note that she takes the time to carefully listen to their concerns, explain diagnoses and treatment options, and ensure they feel comfortable and informed throughout their visit. Her ability to balance efficiency with a thoughtful bedside manner helps patients feel well cared for while keeping appointments running smoothly.

Convenient Locations in New York

Dr. Gruson sees patients at multiple Skin Institute of New York offices.

Bay Ridge, Brooklyn

7901 4th Ave, Brooklyn, NY 11209

Phone: 800-778-3090

Hours:

• Mon-Thu: 9:00 AM – 8:00 PM
• Fri: 9:00 AM – 6:30 PM
• Sat: 9:00 AM – 3:00 PM
• Sun: 9:00 AM – 2:00 PM

Serving patients from: Bay Ridge, Dyker Heights, Bensonhurst, Sunset Park, Fort Hamilton, Staten Island, and surrounding South Brooklyn communities.

Schedule an Appointment at Bay Ridge

Upper East Side

69 E 76th St, New York, NY 10021

Phone: 800-778-3090

Hours:

• Mon: 9:00 AM – 5:00 PM
• Tue–Thu: 9:00 AM – 8:00 PM
• Fri: 8:00 AM – 4:00 PM
• Sat–Sun: Closed

Serving patients from: Upper East Side, Lenox Hill, Carnegie Hill, Yorkville, Midtown East, Roosevelt Island, Upper West Side, East Harlem, and surrounding Manhattan communities.

Schedule an Appointment on the Upper East Side

Accepted Insurance Plans

Dr. Gruson accepts many major insurance providers, including:

• Aetna
• Anthem Blue Cross Blue Shield
• Blue Cross Blue Shield
• Cigna
• EmblemHealth
• Empire Blue Cross Blue Shield
• HealthFirst (NY)
• UnitedHealthcare
• UnitedHealthcare Oxford
• Fidelis Care (NY)
• Humana
• Medicare
• Multiplan PHCS
• 1199SEIU

Patients should contact the office to confirm coverage for their specific plan.

About SINY Dermatology (Skin Institute of New York)

The Skin Institute of New York (SINY®) is a leading dermatology group providing medical, surgical, and cosmetic dermatology services across New York City and Long Island. SINY physicians combine advanced clinical training, academic excellence, and patient-centered care to deliver individualized, evidence-based treatment for every patient.