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Jeffrey Crespin, MD

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Jeffrey Crespin, MD, has been a practicing gastroenterologist in Manhattan for more than 20 years and has convenient office locations across New York City in the Upper East Side, Midtown East, and Midtown West. As a board-certified gastroenterologist, Dr. Crespin strives to provide the highest quality medical care in a compassionate, professional, and personalized manner.

Dr. Crespin graduated cum laude from Harvard University with a bachelor’s degree in biology. After spending a year studying cinema, psychology, and literature at the Sorbonne in France, Dr. Crespin attended Washington University School of Medicine in St. Louis, Missouri, where he graduated with his medical degree. He then completed his internship and residency training through the University of Minnesota before rounding out his training with a fellowship in gastroenterology at Northwestern Memorial Hospital in Chicago, Illinois. In addition to his medical education and training, Dr. Crespin has a Master of Business Administration from the New York University (NYU) Stern School of Business.

Before opening up his private practice, Dr. Crespin served as the director of the Columbia-St. Luke's Roosevelt GI clinic. He is expertly trained in endoscopic procedures, which allows for direct visualization of the intestinal tract for optimal diagnosis, treatment, and prevention of gastrointestinal diseases such as irritable bowel syndrome, Crohn’s disease, and colitis. To ensure his patients have access to the best care possible, Dr. Crespin conveniently offers same-day, late-hour, and weekend appointments.

Recognized as one of New York’s “Top Doctors,” Dr. Crespin is affiliated with NYU Lenox Hill Hospital, St. Luke's Roosevelt, and the Beth Israel hospitals. He is also a clinical assistant professor of medicine at NYU.

 

Dr. William Martin is a top-rated internist and primary care physician serving patients from Midtown Manhattan and throughout the Greater New York City metro region. As a skilled and compassionate physician, Dr. Martin is skilled in the diagnosis and treatment of a wide array of conditions, including sinusitis, bronchitis, asthma, diabetes, urinary tract infections, high cholesterol and high blood pressure, chronic fatigue, migraines, eczema, psoriasis, colds and other respiratory infections, back pain, anxiety and depression, and thyroid disorders.

Dr. Martin received his medical degree from the University of Vermont after receiving a bachelor's degree in chemistry from the same institution, and completed his residency in internal medicine at St. Lukes-Roosevelt Hospital in New York City. As a leading physician dedicated to the needs of his patients, Dr. Martin maintains active memberships in several medical associations and is a diplomate of the American Board of Internal Medicine.

Dr. Martin is a strong proponent of patient-centered care and patient education, ensuring each patient he treats receives the most appropriate care and treatment based on an in-depth evaluation of the patient's unique needs, medical history and current health status. During office visits, every patient receives the information they need to understand the medical issues they face, including existing and emerging disease risk factors, and the treatment options that are available to them so they can make confident and informed decisions about their care.

Dr. Martin enjoys meeting new patients at his practice on East 54^th Street, and the practice accepts most major forms of medical insurance plans.

Henock Saint-Jacques, MD, FACC, is a distinguished cardiologist and head clinician at Harlem Cardiology on Madison Avenue in East Harlem of New York City. Dr. Saint-Jacques is held in high esteem throughout New York City and is a deservedly popular speaker at medical conferences and meetings. He also mentors medical students and postgraduate fellows.

Dr. Saint-Jacques studied for his medical degree at Universidad de Ciencias Medicas (UCIMED) in San Jose, Costa Rica. After graduating, he relocated to New York City for a residency in internal medicine at Cabrini Medical Center, which he completed in 1998, followed by a fellowship in cardiology at the Montreal Heart Institute in Canada. After completing his fellowship in 2001, Dr. Saint-Jacques studied at Duke University School of Medicine in Durham, North Carolina, and achieved cardiovascular disease certification with the American Board of Internal Medicine in 2003.

Dr. Saint-Jacques is a Fellow of the American College of Cardiology, a distinction that recognizes members who have achieved exceptional standards of professional excellence and made a significant contribution to the field of cardiovascular medicine.

Preview Dr. Saint-Jacques Doximity Profile HERE. 

Dr. Michael Aziz is a board-certified Internal Medicine physician, author, and a broadcast media commentator. He serves as an attending physician at Lenox Hill Hospital in New York City. Dr. Aziz completed his medical training at Long Island Jewish Medical Center and Staten Island University Hospital. He is a member of the American College of Physicians,  the American Society of Internal Medicine, and a fellow of the Royal Society of Medicine in the United Kingdom. Dr. Aziz has also been a keynote speaker at numerous national and international conferences, including those organized by the American Academy of Anti-Aging Medicine.

As the founder of the practice that integrates traditional and functional medicine, Dr. Aziz focuses on addressing  the root causes of diseases. He is the author of "The Perfect Diet," a book that challenges outdated dietary guidelines, and advocates a balanced diet including full-fat products. The Perfect 10 Diet is also different from both low-carb and keto diets since it is balanced and it does not allow any chemicals such as nitrites since they are linked to many types of cancer.  

Upon release, The Perfect 10 Diet and Dr. Michael Aziz were featured on ABC's billboard in Times Square in NYC. He also made it on the cover of "First for Women," one of the largest magazines in the United States. The Perfect 10 Diet went on to become a national bestseller. The Perfect 10 Diet hit the number one book sold and downloaded on Amazon for 12 consecutive weeks. The Perfect 10 Diet was translated into several foreign languages including; Italian, Chinese, Mandarin, Slovenian, Urdu, Malay, and Indonesian. Dr. Aziz and The Perfect 10 Diet were featured on countless TV shows including "The View," "The Doctors," "Fox and Friends," and "Dr. Oz." 

In 2025, Dr. Aziz released "The Ageless Revolution,' a book that addresses aging as a disease by targeting its underlying causes. Motivated by the high mortality rates in the US during the COVID-19 pandemic, he emphasizes the need for proactive health measures to increase lifespan. His approach integrates traditional and functional medicine aiming to treat the root causes of diseases rather than the sypmtoms. The book was an immediate bestseller upon release, hitting the number one spot on Amazon in the longevity category. It has also been picked up internationally to be translated into several foreign languages.

Dr Aziz is a prolific medical contributor to Life Extension Magazine with the "Ask the Doctor"column. He has also been a medical contributor to The Boardroom Newsletters which reached over 7 million subscribers with health advice. Dr. Aziz's columns, articles, and opinions have been published in The LA Times, CNN.com, Fox.com, The Washington Post, WebMD, The NY Post, the Daily News,  as well as in many publications internationally such as The Daily Mail, in the UK, and Paris Match, in France. 

Dr. Aziz regularly provides medical commentary on many health networks, including NPR, Fox, ABC, WGN Chicago, NBC, Telemundo, and Dubai TV. Dr. Aziz is passionate about philanthropy. He has volunteered to help New Yorkers during the Covid-19 pandemic, and has volunteered in rural islands in Indonesia. He is also donating the proceeds of The Ageless Revolution to help women affected by breast cancer. 

Dr. Saltzman realized a calling to medicine during the height of the HIV/AIDS crisis in New York City in the mid-eighties.  Prior to entering the field of medicine Dr. Saltzman worked in the music business for record companies and publishers. Moving in the NYC club scene of the nineties, Dr. Saltzman saw many of her friends and colleagues become ill with AIDS.  She observed the rampant prejudice and stigma that LGBTQ people and IV drug users suffered, and committed herself to becoming a physician specializing in HIV/AIDS.

Despite not having a background in the sciences Dr. Saltzman was able to earn admission to medical school, while supporting herself as a single parent.  After medical school, she chose to do her residency at St. Vincent’s Hospital in New York City, which was at the forefront of providing specialized treatment for patients with HIV/AIDS.  After completing her residency, she practiced at the Samuels Clinic at Roosevelt Hospital (now The Institute for Advanced Medicine at Mount Sinai), a major outpatient center for patients during the epidemic.  While practicing at the Samuels Clinic, Dr. Saltzman was an early prescriber of the “triple cocktail”, the first effective combination therapy for HIV.

Dr. Saltzman’s interest in addiction was born out of her experience providing care for HIV/AIDS patients who were often IV drug users. She was one of the first physicians in New York City to embrace the use of Suboxone, a novel medication for the treatment of opiate addiction, that allows patients to access treatment without daily clinic visits as is the case with methadone therapy.  Suboxone was one of the first therapies approved for in-office prescribing under the federal Drug Addiction Treatment Act of 2000. By prescribing Suboxone on an outpatient basis Dr. Saltzman is able to help patients get back to their work and family, and functioning at a high level.

Dr. Saltzman founded her busy Midtown Health and Wellness Center in 2000.  She focuses on providing individualized care, realizing that patients need more than the standardized approach for addiction treatment.  Dr. Saltzman provides guidance through all stages of recovery, supporting patients with primary care, individual and group therapy. She feels addiction is treated incorrectly in many settings with a focus on simply handing out prescriptions, instead of a more comprehensive approach.
Dr. Saltzman is a well-known expert in the field of addiction and regularly expresses her views on television, radio, and in the press.  She uses warmth and humor to engage with her patients. She understands where they’re coming from and does not judge them, using empathy and compassion to deliver the most appropriate individualized treatment options.

Jeffrey Crespin, MD

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Jeffrey Crespin, MD, has been a practicing gastroenterologist in Manhattan for more than 20 years and has convenient office locations across New York City in the Upper East Side, Midtown East, and Midtown West. As a board-certified gastroenterologist, Dr. Crespin strives to provide the highest quality medical care in a compassionate, professional, and personalized manner.

Dr. Crespin graduated cum laude from Harvard University with a bachelor’s degree in biology. After spending a year studying cinema, psychology, and literature at the Sorbonne in France, Dr. Crespin attended Washington University School of Medicine in St. Louis, Missouri, where he graduated with his medical degree. He then completed his internship and residency training through the University of Minnesota before rounding out his training with a fellowship in gastroenterology at Northwestern Memorial Hospital in Chicago, Illinois. In addition to his medical education and training, Dr. Crespin has a Master of Business Administration from the New York University (NYU) Stern School of Business.

Before opening up his private practice, Dr. Crespin served as the director of the Columbia-St. Luke's Roosevelt GI clinic. He is expertly trained in endoscopic procedures, which allows for direct visualization of the intestinal tract for optimal diagnosis, treatment, and prevention of gastrointestinal diseases such as irritable bowel syndrome, Crohn’s disease, and colitis. To ensure his patients have access to the best care possible, Dr. Crespin conveniently offers same-day, late-hour, and weekend appointments.

Recognized as one of New York’s “Top Doctors,” Dr. Crespin is affiliated with NYU Lenox Hill Hospital, St. Luke's Roosevelt, and the Beth Israel hospitals. He is also a clinical assistant professor of medicine at NYU.

 

Dr. David Harnick is a board-certified cardiologist and electrophysiologist who provides exceptional cardiovascular care at Heartwise Cardiology in the Murray Hill and Upper East Side neighborhoods of New York City.

While he treats the full range of heart conditions, he specializes in helping patients with cardiac arrhythmias, dizziness, and syncope. He specializes in implanting cardiac devices such as pacemakers and defibrillators, and he is an expert in performing a full range of cardiac ablations.

He has been placing Implantable Loop Recorders (ILRs) in the convenience of his office as a quick, safe, and easy procedure to help diagnose and treat arrhythmias.

Dr. Harnick received his undergraduate degree from Rutgers University in New Jersey, where he graduated summa cum laude as a Henry Rutgers Scholar Award recipient. He then graduated with his Doctor of Medicine from the Icahn School of Medicine at Mount Sinai in New York City.

During his second year in medical school, he was awarded a research scholarship from the Howard Hughes Medical Institute Investigator Program. He successfully cloned the first calcium channel in human T-cells, which contributed to understanding the mechanisms involved in cellular signaling. After completing his internal medicine residency at Columbia University Irving Medical Center in New York City, Dr. Harnick returned to Mount Sinai to pursue advanced training in general cardiology and cardiac electrophysiology.

In addition to being named to the New York Times Super Doctors of New York, Dr. Harnick has also been featured in Castle Connolly Best Physicians. He often lectures medical professionals on atrial fibrillation and anticoagulation management and stays involved in clinical trials on multiple studies from cardiac devices to new pharmacologic agents.

Dr. Harnick is affiliated with two prestigious New York City hospitals -  The Mount Sinai Medical Center and Lenox Hill Hospital. He serves as an assistant clinical professor at Mount Sinai Medical Center and a clinical instructor at Lenox Hill, where he is involved in regular teaching of cardiology fellows.

Dr. Harnick welcomes the opportunity to help new and existing patients achieve optimal heart health. 

Dr. Raymonda Rastegar is a triple-boarded cardiologist with certifications in general cardiology, echocardiography, and nuclear cardiology. She has expertise in general and noninvasive cardiology, as well as preventive care. At Heartwise Cardiology in the Murray Hill neighborhood of Manhattan, New York, she treats varied cardiovascular conditions with a special interest in helping patients prevent heart disease and heart attacks. 

With board certification in echocardiography and nuclear cardiology, she offers extensive in-office testing to quickly and accurately diagnose cardiovascular conditions, such as coronary artery disease and valvular heart disease. 

Dr. Rastegar received her medical degree from the Icahn School of Medicine at Mount Sinai in New York City. She remained at Mount Sinai for her residency and fellowship training in cardiovascular diseases. 

After completing her fellowship, Dr. Rastegar became co-director of echocardiography and noninvasive cardiology at Beth Israel Medical Center-North Division in New York City. Then she established her private practice, where she is currently the co-director of Heartwise Cardiology.

Dr. Rastegar is affiliated with two prestigious institutions in NY City - New York University Langone Medical Center and the Mount Sinai Medical Center. Dr. Rastegar continues her academic endeavors by teaching medical students and residents at these medical centers.

She stays on the cutting edge of cardiology with her involvement in clinical research studies, including dyslipidemia and coronary artery disease. She is an active speaker and lecturer on these topics.

Dr. Rastegar is honored to be named the New York Times Super Doctors of New York and NY Top Docs best doctors. Dr. Rastegar prides herself on providing personalized and thorough care. She looks forward to working one-on-one with new and existing patients whether they want to prevent heart disease or need exceptional care for existing conditions.

Kornelia Teslic, MD  is a Board Certified Diagnostic NeuroRadiologist at Citimed Comprehensive TBI Center. She completed her fellowships at Weill Cornell, NY, and Memorial Sloan- Kettering Cancer Center, NY. She has 20 years of experience in neuroimaging including advanced MRI techniques. She speaks English, Spanish, Croatian, and Serbian.

As a highly-trained diagnostic radiologist, Dr. Teslic specializes in neuroradiology. She provides a complete range of diagnostic imaging services, including advanced diffusion-weighted MRIs for cancer detection and diffusion tensor MRIs for brain imaging.   

Robert Waxman, MD Board Certified Radiologist. He completed his fellowship at Body Imaging & Musculoskeletal, Thomas Jefferson University Hospital, Philadelphia, PA. Dr. Waxman is extremely knowledgable in any musculoskeletal imaging. 

Damon Spitz, MD Board Certified Radiologist in Musculoskeletal Radiology. Dr. Spitz completed his fellowship at New England Baptist Hospital Beth Israel Deaconess Medical Center.  Dr. Spitz plays a key role in expanding the radiology and interventional pain services and building a strong foundation for musculosketal reads.

 

 

Elizabeth Sharp Edens, M.D., DABOM, IFMCP is a board-certified Internal Medicine and Obesity Medicine Physician, Institute for Functional Medicine Certified Practitioner and the founder of Health Meets Wellness. Dr. Sharp started Health Meets Wellness to make functional medicine more accessible, combining her expertise in healthcare with physical activity, specifically yoga. Dr. Sharp completed her 200-hour yoga teacher training and believes in combining daily movement practices with medicine to help treat her patients. She is dedicated to helping her patients reach their wellness goals and developed the Health Meet Wellness method with Troy Flanagan, Ph.D. and Susie Parker-Simmons, RDN, specifically to help patients with weight management. 

In addition to her innovative practice, she is an Assistant Professor at Mount Sinai Hospital. She graduated medical school Magna Cum Laude from St. George’s University and completed her residency in Manhattan at Lenox Hill Hospital. After residency, she worked for Mount Sinai Doctors where she was awarded the Cullman Family Award for Excellence in Physician Communication and worked at OneMedical. Through her education and real-life experience, Sharp uncovered that taking a functional medicine approach helps diagnose and treat the root cause of her patient’s symptoms and disease processes. Her patient-centered style of practice combines diet and lifestyle with medicine to deliver multifaceted, holistic care for her patients. When she's not seeing patients she enjoys cooking, hiking, rock climbing , running, yoga and spending time with her friends and family.

As a highly motivated and dedicated bilingual community-based physician at identID Health, I have the privilege of being part of a leading online telemedicine clinic. Our focus is on delivering specialized, comprehensive and expert care in weight loss management, testosterone replacement therapy, erectile dysfunction, insomnia, hair loss, and performance anxiety. We are committed to serving both men and women, ensuring that each patient receives personalized care tailored to their unique needs. At identID Health, I am committed to guiding you on a journey towards taking control of your lifestyle. Through empowering, stigma-free healthcare, we work together to achieve your health goals. Our approach is not just treating symptoms; it's about fostering a holistic transformation that promotes overall well-being and a higher quality of life. Join me and the team at identID Health, by choosing our services, you are taking the first crucial step towards a healthier, more vibrant you.

Ahmadur Rahman is a detailed and thorough physician specializing in internal medicine and primary care. Dr. Rahman is serving his patients in Manahattan, NY and Jamaica, NY with his two private practices. He is certified by the American Board of Internal Medicine. 

Dr. Rahman received his doctorate degree from the Ross University School of Medicine. He then completed his Internal Medicine residency at the Newark Beth Israel Medical Center. Dr. Rahman welcomes patients to his practice who are experiencing issues such as acne, bunions, arthritis, asthma, ear infections, and diabetes. With his informative bedside manner, Dr. Rahman works to a solution for improved health and healing. Dr. Rahman provides services for his patients that include annual physicals, ECG/EKG, bone density measurements, and annual skin screenings, among many others. 

Dr. Rahman enjoys participating in outdoor activities, when time permits. He enjoys spending time with his family, photography, and traveling.

Dr. Rafael A. Guillén is an internist in the Bronx, in New York City. As the physician at R. Guillén MD PC, Dr. Guillén offers a wide range of care including allergy care, help with obesity, hepatitis care, diabetes care, cholesterol management, high blood pressure treatment, asthma treatment, and arthritis treatment. R. Guillen MD PC is a Patient-Centered Medical Home, recognized by the National Committee for Quality Assurance for providing coordinated, advanced primary care, ensuring that patients are put in the forefront of their care, and a commitment made for continuous quality improvement. Dr. Guillén offers comprehensive health care for adults in the Bronx area. He’s bilingual in English and Spanish and has also carefully chosen a multi-lingual staff for the convenience of his patients.

Dr. Guillén attended the University Eugenio Maria de Hostos School of Medicine in the Dominican Republic. He completed his residency in Internal Medicine at the Bronx-Lebanon Hospital Center in the Bronx, New York. Dr. Guillén is a Diplomate of the American Board of Internal Medicine, and a Fellow of the American College of Physicians. He is an active member of numerous medical organizations, including the American Medical Association, the American College of Physicians, and the Dominican College of Physicians.

Dr. Guillén and his team look forward to seeing new patients and established patients alike. Contact the office anytime to arrange an appointment.

Dr. Barry Cohen is an Internal Medicine/Primary Care physician in New York City. He has worked in private practice and as an Attending Physician for the Montefiore Medical Group in the Bronx. He currently has a private practice in the Soho area of Manhattan. Dr Cohen was a Clinical Instructor of Family and Social Medicine at the Albert Einstein School of Medicine for approximately 12 years.. He is currently affiliated with the Mount Sinai/Beth Israel Medical Center of New York, where he is an Attending Physician. Earlier in his career he spent 3 years working with Doctors of the World in their Human Rights Clinic.

Dr. Marissa T. Santos has more than 25 years of experience as a board-certified internist and aesthetic medicine physician. At her Woodside, New York solo practice, Marissa T. Santos, M.D., Dr. Santos offers a wide variety of care for adult patients, including preventive health care, laser hair removal, CoolSculpting® fat removal, screenings including Pap smear, and many other kinds of care. As a licensed Civil Surgeon, Dr. Santos performs medical immigration exams as well.

Dr. Santos is Patient-Centered Medical Home (PCMH) certified. The PCMH certification is a highly respected one that means a physician is qualified to manage the entire spectrum of patient health needs. If patients need specialists, they’re right on the premises. Dr. Santos maintains local hospital affiliations to be there for her patients at all times,

Having earned her medical degree at the University of Santo Tomas in Manila, Philippines, Dr. Santos then continued her medical education at the State University of New York Downstate Medical Center, the Jersey Shore University Medical Center, and the New York Hospital in Queens. Dr. Santos regularly attends internal medicine conferences so that she can keep her practice up-to-date with the newest advances in medicine.

Dr. Santos speaks Spanish, English, Filipino, and Russian, and she enjoys talking with patients in the language they feel most comfortable speaking. Use the online appointment tool to schedule now, or call for an appointment with Dr. Santos.