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Sahar Y. Naseer, MD, is a talented dermatologist at MDCS Dermatology: Medical Dermatology & Cosmetic Surgery in Smithtown and Hampton Bays, New York. With her extensive background in research, she brings fresh ideas to the table for each of her patients’ treatment plans. A member of the American Academy of Dermatology, she was selected to be a part of the prestigious Alpha Omega Alpha Honor Medical Society due to her skills and achievements.

Dr. Naseer earned her bachelor’s degree in neuroscience at Dartmouth College in Hanover, New Hampshire, where she graduated with honors in 2009. She then moved south to Washington, DC, to attend Georgetown University for her master’s degree in biophysiology. After completing it in just one year, she moved to New York to earn her medical degree through The State University of New York Jacobs School of Medicine and Biomedical Sciences and Buffalo University, where she graduated summa cum laude. 

After finishing her formal education, Dr. Naseer continued training with a pediatric preliminary year at Cohen Children’s Medical Center/Northwell Health in Queens, New York. For her postgraduate year two, she moved back to Buffalo, New York, for a dermatology residency. She continued with another dermatology residency at Brown University Alpert School of Medicine in Providence, Rhode Island.

Dr. Naseer’s many awards and distinguishments across her education, training, and budding career speak for themselves. She earned multiple awards at Buffalo University for her excellence in research and earned the American Medical Women’s Association Glasgow-Rubin Certificate of Commendation. At MDCS, she continues to stand out as an outstanding leader and treats her patients with kindness and compassion.

When she isn’t in the office assessing skin conditions or educating patients on how to care for their skin, Dr. Naseer loves to spend her time traveling, swimming to stay in shape, and improving her cooking skills.

Dr. Devin Burr is a board-certified dermatologist and Mohs surgeon who believes that great dermatologic care starts with education, trust, and treating the whole person—not just a diagnosis.

He has a particular focus on skin cancer management, including Mohs micrographic surgery and image-guided superficial radiation therapy (IG-SRT), and is committed to helping patients understand all appropriate treatment options so they can make informed, confident decisions about their care. Dr. Burr stays current with the latest dermatology research and advances in treatment, ensuring that his patients benefit from evidence-based, up-to-date care.

Education is central to Dr. Burr’s approach. He is known for taking time to explain conditions, treatments, and expectations in a clear and practical way—helping patients feel informed rather than overwhelmed. His goal is for every patient to leave the clinic with clarity, confidence, and a plan they truly understand. For patients who want to explore topics further, Dr. Burr also maintains a personal website where he shares educational writings on common skin conditions and treatments. You can access the website here.

Dr. Burr earned his undergraduate degree from Brigham Young University and completed medical school at Western University of Health Sciences in Lebanon, Oregon. He went on to complete his dermatology residency at the Aspen Dermatology Residency Program in Spanish Fork, Utah, where he received extensive training in medical, surgical, and procedural dermatology.

Outside of the clinic, Dr. Burr is a husband and the proud father of four children—one son and three daughters. He enjoys spending time with his family, following sports, and staying active in the community he serves.

Christos Dimitris Zouzias, MD, MBA, is a board-certified dermatologist and fellowship-trained Mohs Micrographic Surgeon at MDCS Dermatology. Dr. Zouzias specializes in procedural dermatology, skin cancer management, and Mohs micrographic surgery, offering personalized and patient-centered care to ensure the best outcomes for his patients. He serves patients at MDCS Dermatology's Long Island locations, including Commack, Hampton Bays, and Plainview.

Dr. Zouzias earned both his Bachelor of Arts and Doctor of Medicine degrees at New York University (NYU) in New York City. He also holds a Master of Business Administration (MBA) from NYU’s Stern School of Business. Prior to medical school, he completed a student research fellowship in supportive oncodermatology, studying the dermatologic side effects of chemotherapy and radiation therapy under the mentorship of Dr. Beth McLellan, the current chief of dermatology at Montefiore Medical Center.

Following his medical degree, Dr. Zouzias completed his internship in internal medicine at North Shore Long Island Jewish Medical Center and his dermatology residency at Albert Einstein College of Medicine/Montefiore Medical Center, where he was recognized as the Outstanding House Officer for his compassion, clinical excellence, and professional rapport. He further specialized by completing his fellowship training in Mohs Micrographic Surgery at Affiliated Dermatologists and Dermatologic Surgeons in New Jersey.

In his free time, Dr. Zouzias enjoys cooking and spending time with his nieces and nephews.

Carolyn Stull, MD, FAAD, is a board-certified dermatologist and fellowship-trained dermatologic surgeon. She treats the full spectrum of dermatologic conditions and specializes in Mohs micrographic surgery, surgical reconstruction following skin cancer removal, and facial aesthetics.

Dr. Stull is originally from Philadelphia and served as an Instructor of Dermatology at the University of Pennsylvania prior to joining MDCS. She earned her undergraduate degree from the University of Miami and her medical degree from Temple University School of Medicine. Dr. Stull completed dermatology residency at Rush University Medical Center in Chicago where she served as chief resident. She subsequently completed a fellowship in Mohs micrographic surgery and dermatologic oncology at the University of Texas M.D. Anderson Cancer Center. During fellowship she trained with experts in the management of rare and advanced skin cancers, complex surgical reconstruction and laser procedures. She also served as a sub-investigator for several clinical trials testing oncolytic viruses and immunotherapies for skin cancer treatment.

Dr. Stull has published numerous articles in peer-reviewed journals including the Journal of the American Academy of Dermatology, JAMA Dermatology and Dermatologic Surgery. She has been an invited speaker at regional and national meetings, and has been awarded grant funding from the University of Pennsylvania Center for Human Appearance and the Pennsylvania Medical Society for medical device innovation. She is a fellow of the American Academy of Dermatology and American Society for Dermatologic Surgery.

Outside of the office Dr. Stull enjoys traveling and spending time with her husband who is plastic surgeon and their daughter.

We are excited to welcome Dr. Kalee Shah to MDCS Dermatology! Dr. Shah is double
board-certified in Dermatology and Micrographic Dermatologic Surgery by the American
Board of Dermatology

She grew up in Southern California and graduated as a Presidential and Renaissance
scholar from the University of Southern California. She subsequently moved to New
York to earn her medical degree at Weill Cornell Medical College. During medical school,
she was inducted into the Alpha Omega Alpha honor society and a recipient of the
Glasgow-Rubin Memorial Achievement Award honoring select women for academic
achievement.

Dr. Shah completed her internship at Memorial Sloan Kettering Cancer Center and
her dermatology residency at New York-Presbyterian Weill Cornell Medical Center. In her
final year, she served as Chief Resident. Following residency, she completed
subspecialty fellowship training in Mohs micrographic surgery, cutaneous oncology, and
reconstructive surgery at Memorial Sloan Kettering Cancer Center and Weill Cornell
Medicine. She then became Director of Mohs Micrographic Surgery at
Northwell-Lenox Hill Hospital.

Dr. Shah's primary clinical focus is the management of skin cancers including
squamous cell carcinoma, basal cell carcinoma, early-stage melanoma, and rare
cutaneous tumors. She additionally provides medical, cosmetic, and laser dermatology
services. Dr. Shah lives in New York City with her husband and miniature dachshund, Gus.

Board certifications:

• Dermatology - American Board of Dermatology
• Academic titles
• Assistant Professor, Donald and Barbara Zucker School of Medicine at
  Hofstra/Northwell

Education:

• Weill Cornell Medical College

Residencies:

• New York Hospital Weill Cornell Medical Center

Fellowships:

• Memorial Sloan-Kettering Cancer Center

Dr. Sheena Desai is a board-certified dermatologist with expertise in medical, surgical, and cosmetic dermatology. She received her medical degree from Tufts University School of Medicine and completed her dermatology residency at Northwell Health, where she served as Cosmetic Chief Resident. In addition to her MD, Dr. Desai holds an MBA from the Heller School at Brandeis University, providing her with a unique understanding of both patient care and healthcare systems.

Dr. Desai has authored numerous publications in leading dermatology journals and has presented nationally on topics including skin cancer prevention, autoimmune skin conditions, and healthcare policy. Her clinical interests include acne, rosacea, eczema, skin cancer detection and treatment, and minimally invasive aesthetic procedures such as lasers, injectables, and microneedling.

With a warm, thoughtful approach, Dr. Desai is committed to delivering high-quality, personalized care to each of her patients.

She sees patients at MDCS Dermatology in Clifton and Englewood, New Jersey.

Timothy E. Knight, MD is a dermatologist at North County Dermatology Clinic. Serving patients in Lakeland, Florida, he enjoys the problem-solution process in dermatology. When it comes to his patients, he views each person as an individual, fascinating mystery just waiting to be solved.

Dr. Knight has practiced dermatology for more than 35 years and is board certified by the American Board of Dermatology. He earned his medical degree from the University of Missouri-Columbia and completed his internship in internal medicine at the Tripler Army Medical Center in Honolulu. He also completed his dermatology residency at the University of Maryland Medical System in Baltimore.

As a lifelong learner, Dr. Knight has published numerous research studies in peer-reviewed journals, and he has presented nationally. He previously served as an assistant professor at several medical schools.

In addition to a medical degree, Dr. Knight earned a Doctor of Veterinary Medicine from Tufts University School of Veterinary Medicine in 1999. He has received many academic honors in the veterinary field, including the Clinic Volunteer of the Year Award from the Society for the Prevention of Cruelty of Animals in 2003 and 2007. Dr. Knight is also a veteran of the United States Army, where he was a captain of the Medical Corps. Prior to the Army, Dr. Knight was an Airman First Class of the Missouri National Guard.

Dr. Knight generously participates in community service and has volunteered as a dermatologist with Talofa Medical Mission, where he provided charity medical services for two weeks yearly in Polynesia over a 10-year period. He has also been a weekly volunteer veterinarian for the Society for Prevention of Cruelty to Animals in Lakeland.

He is pleased to offer services that keep pace with modern technology and medical breakthroughs, and he enjoys nothing more than bringing gratitude and joy to his patients.

Toral Vaidya, MD, MPH, is a dermatologist serving New York City patients on the Upper East Side and Midtown Manhattan at MDCS Dermatology. She performs a wide variety of medical, cosmetic, and surgical dermatology services. 

Dr. Vaidya completed her undergraduate and graduate education at the University of Cincinnati in the BS/MD Dual Admissions Program in Medicine. She earned her MD and Master’s in Public Health from the University of Cincinnati College of Medicine. During medical school, Dr. Vaidya was selected for a prestigious clinical research fellowship in dermatology at Memorial Sloan Kettering Cancer Center, where she conducted studies in oncodermatology and procedural dermatology. She graduated at the top of her class with a Distinction in Dermatology. She then completed her internship in Internal Medicine at Mount Sinai Hospital and her residency in Dermatology at New York Presbyterian Hospital/Weill Cornell Medical Center. 

Throughout her training, she developed a keen interest in skincare, skin of color, and cosmetic dermatology. She has authored over 20 scientific publications in prominent dermatology journals and has presented her work at national and international meetings. She is a member of several professional organizations, including the Skin of Color Society, the American Society for Dermatologic Surgery, and the American Society for Laser Medicine and Surgery. 

Dr. Vaidya is a media expert who regularly writes for and contributes to medical and beauty publications, including Medscape Dermatology, US News and World Report, and Byrdie Beauty. Additionally, she pursued an elective in medical journalism at the ABC News Medical Unit, where she helped produce medical segments for Good Morning America and wrote digital articles. 

Dr. Vaidya's interests in aesthetics and procedural dermatology are complemented by her certification in Fashion Design and Garment Construction from Parsons School of Design in New York City. In her free time, she enjoys traveling and exploring the arts.

CEO, MDCS: Medical Dermatology & Cosmetic Surgery

Dr. Parinita Amin, affectionately known as Dr. Pari, is the CEO of MDCS: Medical Dermatology & Cosmetic Surgery, a premier dermatology practice with locations in New York and New Jersey.

An alumna of Harvard College, Dr. Pari went on to earn her medical degree from the Albert Einstein College of Medicine, where she was honored with membership in the prestigious Alpha Omega Alpha medical honor society. She further honed her medical expertise during an internship at Beth Israel Medical Center, followed by a rigorous residency in radiology at NYU Langone Medical Center.

With a background as an accomplished diagnostic and procedural radiologist, Dr. Pari brings a unique blend of clinical acumen and leadership to her role. Since 2014, she has been at the helm of MDCS, where she continues to drive the practice's growth and commitment to delivering exceptional dermatologic care.

Regina Yavel, MD, FACMS, FAAD is a board certified and fellowship trained Mohs Surgeon, is a graduate of Brown University and SUNY Downstate Medical Center. Dr. Yavel is a Fellow of the American Academy of Dermatology, Dermatology Foundation Leaders Society, American Society of Dermatologic Surgery and American College of Mohs Surgery.

Christina Mitchell, MD, is an accomplished dermatologist with a passion for helping her patients feel great in their own skin. Through her work at Dermatology Specialists of Gainesville in Newberry, Florida, Dr. Mitchell is honored to play a role in creating positive change in the lives of those in her care.

Dr. Mitchell is a Florida native and grew up in North Florida. She chose the University of Florida in Gainesville for her undergraduate studies and remained there to complete her medical degree and residency training in dermatology.

She accepted a position as an assistant professor at the University of Florida in 2008 and remains connected to the school as an adjunct faculty member. She feels strongly about the importance of continuing education and is always searching for programs and training to further refine and expand her skills.

Trained and experienced in all aspects of medical dermatology, Dr. Mitchell works with patients to address numerous skin health needs. She is also proud to include medical aesthetics as part of her services and believes that there is a direct connection between having confidence in the way you look and enjoying optimal overall health.

If you’re searching for a dermatologist who places your needs at the heart of every interaction, schedule a time to meet with Dr. Mitchell to discuss her approach to dermatology and aesthetics.  

Juan-Carlos (J.C.) Caballero, MD, FAAD is board certified in general, surgical, and cosmetic dermatology by the American Board of Dermatology. He leads the team at Warrenton Dermatology & Skin Therapy Center in Warrenton, Virginia.

Dr. Caballero specializes in all aspects of dermatological health and believes that your skin is a reflection of your inner health. He feels that appropriate treatment of dermatologic conditions leads to the overall improvement of your health, well-being, and confidence.

Dr. Caballero attended George Mason University in Fairfax, Virginia, where he obtained his bachelor’s degree in biology. He then went on to earn his Doctor of Medicine from Howard University College of Medicine in Washington, DC, where he was inducted into the Alpha Omega Alpha Honor Medical Society. Induction into this honor society is reserved only for the top medical students in the nation, where each member is recognized for their high academic standards, leadership, high ethical principles, and high standard of character and conduct. Dr. Caballero completed his dermatology residency at Georgetown University Hospital and Washington Hospital Center, both in Washington, DC. He served as chief resident at both hospitals during his last year of training.

In addition to being a diplomate of the American Board of Dermatology, Dr. Caballero is a member and fellow of the American Academy of Dermatology, the American Society of Dermatologic Surgery, and the Medical Society of Virginia. He looks forward to creating long-lasting relationships to meet his patients’ dermatological needs. Dr. Caballero and his staff are dedicated to the fundamental mission of providing the highest level of compassionate care.

John Humeniuk, MD, FRCP has announced his retirement June 30, 2026

Dr. Humeniuk wishes to thank you for putting your trust in him over these many years.

The office will be open and continue to schedule patients up to and including June 30, 2026.

Dr. Humeniuk has arranged for your continued care with:

Carolina Dermatology of Greenville

864-233-6338

Downtown:

5 Stevens Street, Suite 300

Greenville SC 29605

Patewood:

10 Enterprise Blvd, Suite 202

Greenville SC 29615

A board-certified dermatologist, Michael J. Dans, MD, PhD, provides comprehensive medical, surgical, and cosmetic dermatologic care at San Francisco Dermatology in downtown San Francisco near Union Square. He treats all skin conditions, from skin cancers to acne to infections to unwanted age-realated skin changes such as wrinkles and age spots.  By offering personalized care, he helps each patient achieve better skin health and improved appearance.

Dr. Dans received a bachelor’s degree in biochemistry at the University of California, Davis before earning his combined MD/PhD degree at New York University School of Medicine in New York City. He completed his dermatology residency at the Hospital of the University of Pennsylvania in Philadelphia.

As an expert in his field, Dr. Dans has published numerous scientific and medical articles and book chapters about skin diseases and treatments. In addition to being on staff at California Pacific Medical Center, he teaches the next generation of physicians as a volunteer clinical instructor of dermatology at UCSF.

In his free time, Dr. Dans enjoys skiing, hiking, and mountain biking with his family.

Rachel Bognet, MD, is a board-certified dermatologist who specializes in performing Mohs surgery for skin cancer. Dr. Bognet is a kind and compassionate member of the team at CSC Steil Dermatology, serving the western and southwestern suburbs of Chicago with offices conveniently located in Hinsdale and Downers Grove, Illinois.

Dr. Bognet obtained her medical degree from Jefferson Medical College in Philadelphia. She then completed her internship at Lehigh Valley Hospital in Allentown, Pennsylvania. Dr. Bognet went on to complete a rigorous residency program at Thomas Jefferson University Hospital in Philadelphia.

Because she is passionate about individualized care for patients of all ages, Dr. Bognet offers convenient appointment days and times. She encourages an honest dialogue with patients so that they can have the information needed on the latest treatments, access to the most state-of-the-art technology, and an open dialogue to develop a personalized long-term skin care plan to restore glowing and natural health.

Danielle King, PA-C is a Certified Physician Assistant at Warrenton Dermatology & Skin Therapy Center, specializing in medical and surgical dermatology. She is honored to serve patients within the Warrenton community and surrounding areas.

Danielle earned her Master of Health Science in Physician Assistant Studies from the University of Maryland (Baltimore) and is certified by the National Commission on Certification of Physician Assistants. Prior to her Physician Assistant studies, Danielle obtained her Bachelor of Science in Biology while playing Division I field hockey at Davidson College in North Carolina.

Danielle gained years of clinical experience in dermatology as a Mohs Surgical Technician, where she assisted Mohs surgeons in removing skin cancers and performing aesthetically pleasing repairs. She underwent an intensive medical dermatology clinical rotation during Physician Assistant training, and has also trained extensively in specialized medical, surgical, and cosmetic dermatology under Dr. Caballero and in Mohs surgery under Dr. Dolan.

Danielle is committed to utilizing the latest advancements in dermatology to provide the highest quality care to her patients. She is a member of the Society of Dermatology Physician Assistants, recently completed a rigorous 6-month Derm Boot Camp with Dr. Boswell, and participates in Dermatology Journal Club.

Outside of the practice, Danielle enjoys playing golf, pickleball, and taking adventures with her fiancé and golden retriever, Jax.

Cassie McGee, MPAS, PA-C has been a Physician Assistant since 2015 where she received her Masters of Physician Assistant degree from Saint Francis University in Pennsylvania.

Originally from Buffalo, New York, she moved to North Carolina in 2017 where she started in Family Practice for 5 years before transitioning to dermatology, her true passion.

She is currently married to her high school sweetheart and sisters to Courtney Littere, PA-C, who also works at the Polley Clinic.

In her free time, she enjoys traveling and spending time with her two beagles, Todd and Copper.

Mohammed Shakir, MPAS, PA-C, is Board-Certified by the National Commission on Certification of Physician Assistants. He received his Master of Physician Assistant Studies from the University of Nebraska Medical Center. He is a member of the American Academy of Physician Assistant and the Society of Dermatology Physician Assistant. He is currently serving as a Medical Officer in the U.S. Army Reserve. He has a special interest in general medical dermatology.