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Byoung Yang, MD, is the experienced physician and wound care specialist at BY Wound Care Internal Medicine in White Plains, New York, where he provides cutting-edge medicine with old-school care. Dr. Yang understands how difficult it is for patients to make decisions about their health care, and spends the time necessary educating his patients so they can make the most informed decisions about their health and medical needs. 

After earning his medical degree at Chonbuk National University School of Medicine in Chonbuk, South Korea, where he graduated in the top 10% of his class, Dr. Yang completed his internship at the National Police Hospital in Seoul, South Korea. He then relocated to the United States to continue his residency training in Internal Medicine at Mt. Vernon Hospital, New York, while also receiving his Pathology residency training at New York Medical College. 

During his internal medicine residency, Dr. Yang was fortunate to train under renowned wound care specialist Jorge Beale, MD. He then completed his fellowship training in wound care and hyperbaric medicine at the esteemed Hospital of the University of Pennsylvania in Philadelphia. 

Dedicated to his profession and medical specialty, Dr. Yang is a frequent speaker at local and national wound care meetings. He was the second-place winner of the 2007 Undersea and Hyperbaric Medical Society President Award for research in stem cells in hyperbaric oxygen. 

Dr. Yang holds board certifications from the Undersea and Hyperbaric Medical Society and the American Board of Internal Medicine. He is an affiliated physician with White Plains Hospital.

Dr. Yang is a classical pianist and painter.

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. 

East Side Primary Medical Care is a comprehensive health care practice proudly serving the wonderful community in Upper East Side, New York, New York. Under the care of Daniel Klein, MD, FACP, the practice has become a valued resource for adults and seniors throughout the region. 

Daniel Klein, MD, FACP, provides compassionate and understanding primary care for adults and geriatrics. He shapes his patient care approach around the belief that everyone deserves access to convenient care, and works hard to provide quality medical care services, concierge primary care, telemedicine to meet all of your health needs and goals.

Dr. Klein received his medical education at Semmelweis University in Budapest, Hungary before achieving his Doctor of Medicine (MD). He then went on to seek additional educational opportunities, taking part in an internship program at the Booth Memorial Hospital and a residency program for internal medicine at Flushing Hospital Medical Center. 

His past hospital affiliations include providing medical services at Lenox Hill Hospital, Mount Sinai Hospital, and Mount Sinai West. He currently holds professional membership at the American College of Physicians. 

Dr. Klein is able to speak multiple languages with his patients at East Side Primary Medical Care, including English, Hungarian and Tagalog. With each patient, he hopes to provide caring support, making sure they have enough time to have all of their questions answered and deliver the best care possible for their concerns. 

Residents in Upper East Side, New York, who are searching for a compassionate primary care provider, should schedule a time to meet with Dr. Klein and learn more about his empathic approach to patient care. 

Everyone is welcome into East Side Primary Medical Care with open arms, whether they need preventative health care or need a one-on-one consultation for other health conditions. 

Barry J Weinberg, MD, is a pulmonologist (lung specialist) with over 20 years of clinical experience. At his New York City practice on Manhattan’s Upper East Side, Dr. Weinberg provides high-quality diagnosis and treatment with an emphasis on personalizing each patient’s care.

Dr. Weinberg earned his medical degree from the SUNY (State University of New York) Downstate College of Medicine in Brooklyn, New York. He completed his internship and residency in internal medicine and a fellowship in pulmonary and critical care medicine at New York City’s Mount Sinai Beth Israel Hospital. From 1998 to 2004, Dr. Weinberg was the Associate Chief of the Critical Care Division at Mount Sinai Beth Israel.

Dr. Weinberg specializes in pulmonary medicine conditions such as asthma, COPD (chronic obstructive pulmonary disease), interstitial lung disease, and, more recently, COVID-19. He maintains active affiliations with numerous New York City hospitals, including Lenox Hill Hospital on Manhattan’s Upper East Side and Mount Sinai Medical Center. These affiliations allow him to follow his patients when they require hospitalization.

Dr. Weinberg also has close relationships with world-renowned specialists in thoracic surgery, interventional pulmonology, hematology-oncology, and infectious diseases. His patients can be confident that they’ll have access to the best care for all of their needs.

Dr. Timothy Jayasundera and his colleague Dr. Marsha Wesley provide a variety of medical services to their patients from offices located in Ozone Park, Brooklyn, and Manhattan, New York. Services range from primary care, annual wellness checkups, and regular health screenings to specialist treatment for cardiovascular issues such as hypertension, high cholesterol, chest pain and shortness of breath.

Dr. Jayasundera completed his medical degree at Ross University School of Medicine and his internship in internal medicine at Robert Wood Johnson University Hospital. He went on to complete his residency at Georgetown University and fellowships in Cardiology and Interventional Cardiology at Drexel University and Mount Sinai Hospital, respectively. Dr. Wesley  completed her medical degree at State University of New York (SUNY) Buffalo School of Medicine and Biomedical Sciences.

Drs. Jayasundera and Welsey are all dedicated to providing the highest quality care to their patients. They offer a warm caring environment to make their patients feel comfortable. The doctors take pride in practicing preventative medicine ensuring that all of their patients maintain and improve their health. In addition to treating various medical conditions Dr. Jayasundera and Dr. Wesley also educate patients on their particular medical diagnosis to ensure that the patient maintains good health and stays within healthy guidelines for vital statistics.

Dr. Jayasundera and Dr. Wesley are currently welcoming new patients and looking forward to building lasting relationships to improve and maintain health. Most major forms of insurance are accepted.

Jeffrey Crespin, MD

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.

Igor Chernyavskiy, MD, is a top-ranked pulmonologist and sleep medicine specialist providing patients in Brooklyn, NY 11235 with one of the best and unparalleled levels of care for an array of acute and chronic lung conditions and diseases and sleep disorders.

Dr. Chernyavskiy earned his medical degree at Krasnoyarsk State Medical University in Russia, followed by a residency in internal medicine at Monmouth Medical Center in Long Branch, NJ, and a fellowship in pulmonary care at the State University of New York (SUNY), Stony Brook.

He maintains active memberships in many medical societies including the American Academy of Sleep Medicine, the American Thoracic Society, and the American Medical Association, and is board-certified by the American Board of Sleep Medicine and by the American Board of Internal Medicine in critical care, pulmonary disease, and sleep medicine. In addition to seeing patients at his private practice, Dr. Chernyavskiy maintains hospital affiliations with Stony Brook University Medical Center and the VA Medical Center in Northport.

Dr. Chernyavskiy welcomes new patients and accepts most major insurance plans. He speaks both English and Russian.

Dr. Ijaz Ahmad, M.D., F.A.C.C., is an experienced cardiologist, skilled in the diagnosis and treatment of an array of heart-related diseases and conditions in patients from Park Slope and throughout Brooklyn, NY. At Park Slope Cardiac and Diagnostic, Dr. Ahmad offers patient-centered care for issues like congestive heart failure (CHF), coronary artery disease (CAD), peripheral vascular disease (PVD and PAD) and chest pain. With advanced training in cardiac diagnostic imaging, Dr. Ahmad is skilled in performing echocardiograms, nuclear stress testing and ultrasounds, as well as cardiac catheterization and other minimally-invasive procedures.

A fellow of the American College of Cardiology (F.A.C.C.), Dr. Ahmad specializes in non-invasive and minimally-invasive cardiology to help patients get the care they need while avoiding surgery whenever possible. He and his team at Park Slope Cardiac and Diagnostic are committed to providing the highest quality care throughout every phase of treatment. Patients receive compassionate, customized care focused on their needs and based on in-depth evaluations using state-of-the-art testing and diagnostic techniques and technology for long-term health and wellness. With an emphasis on prevention and education, Dr. Ahmad helps patients understand their medical issues and risks, providing them with the education they need to enjoy better health and a better quality of life.

Dr. Ahmad completed his medical degree at Allama Iqbal Medical College, followed by a residency and internship at Interfaith Medical Center and a fellowship in cardiovascular diseases at New York Methodist Hospital. Widely published in top medical journals, including the International Journal of Cardiovascular Diseases and the Journal of Nuclear Cardiology, Dr. Ahmad was awarded the New York’s Top Doctors Award in 2016. Certified in nuclear cardiology by the American Society of Nuclear Cardiology (ASNC) and echocardiography by the National Board of Echocardiography (NBE), Dr. Ahmad maintains active memberships in several professional societies, including the American College of Cardiology, the American Society of Echocardiography, the American Society of Nuclear Cardiology and the American College of Physicians.

Park Slope Cardiac and Diagnostic welcomes new patients and accepts most major insurance plans. Dr. Ahmad speaks both English and Hindi.

ABOUT US

Peggy Elango, DO, is a primary care physician serving patients in the New York City area. At her practice in the Lenox Hill area of Manhattan, she provides a wide range of internal and concierge medicine services.

Dr. Elango attended Michigan State University, where she received her medical degree. She is board certified by the American Osteopathic Board of Internal Medicine and is a member of the American Osteopathic Association. She speaks English and French, which makes her accessible to patients from a variety of cultural backgrounds.

Dr. Elango is originally from Cameroon and grew up in Atlanta, Georgia. She comes from a family of physicians. Dr. Elango believes in listening to each patient and creating a partnership to maintain and improve lifelong health. Patients trust her expertise because she consistently provides high-quality care that leads to positive and lasting health outcomes.

Dr. Elango is affiliated with Lenox Hill Hospital and NYU Langone Health.

Jeffrey Crespin, MD

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.

Dr. Michael Aziz is a board-certified Internal Medicine physician, author, and a broadcast media commentator. He is 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 in New York. 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 cause of disease. He is the author of "The Perfect Diet," a book that challenges outdated dietary guidelines, and advocates a balanced diet which include butter, and full-fat products. Dr. Michael Aziz was among the first doctors to alert the public about  the danger of seed oils fifteen years ago long before the media caught on.  Dr. Aziz was also the first doctor to alert the public about the dangers of both low-carb and keto diets since he does not allow any chemicals in his diet such as nitrites since the they have been 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 sold in the United States. The Perfect 10 Diet went on to become a national bestseller. The Perfect 10 Diet hit the number one slot 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 his second book, "The Ageless Revolution,' a book that addresses aging as a disease by targeting the cellular malfunction. Disappointed by the high mortality rates in the US during the COVID-19 pandemic, he was motivated to treat aging as a disease. He emphasizes the need for proactive health measures to increase the lifespan in the US. His approach integrates traditional and functional medicine aiming to treat the root cause of disease rather than treating chronic age related diseases. 

The book was an immediate bestseller upon release, hitting the number one spot on Amazon in the longevity category in the first week. The book has also been picked up  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, Katie Couric Media, as well as in tens of publications internationally around the world such as The Daily Mail, Paris Match, The Saigon Times, and El Arabyia.  

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 volunteered to help New Yorkers during the Covid-19 pandemic, and treated the underserved in the rural islands of Indonesia. He is also donating the proceeds of The Ageless Revolution for charity to help women affected by breast cancer. 

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.