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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. 

Dr. Henry Siu earned his Medical Degree from the Sophie Davis School of Biomedical Education/SUNY Downstate Medical Center. He completed his post-graduated training in Internal Medicine at Yale New Haven Hospital, and Cardiology/Interventional Cardiology Fellowship at Thomas Jefferson University Hospital in Philadelphia. 

Dr. Siu has expertise in general cardiology, multi-modality cardiac imaging, and vascular imaging. As an interventional cardiologist, Dr. Siu is highly skilled in cardiac catheterizations and peripheral vascular interventions, and management of complex coronary/valvular heart disease. He has proven experience in private practice and in the academic setting, with focus on providing the highest quality care and most up-to-date diagnostic and treatment strategies. In his free time, Dr. Siu enjoys exercising and playing the piano. Dr. Siu speaks Cantonese, Mandarin, and English.

Dr. David Lau received his Medical Degree and PhD degree in Physiology and Biophysics from NYU School of Medicine.   He completed his entire clinical training in Internal Medicine, Cardiovascular Disease, and Clinical Cardiac Electrophysiology at Columbia University - Presbyterian Medical Center.   Dr. Lau specializes in general cardiology and is an expert at the diagnosis of electrophysiological disorders and management after pacemaker, defibrillator, and remote cardiac monitor implantation.   Dr. Lau has presented his research at national meetings and published extensively in the area of electrophysiology.   He has a particular interest in the management of syncope and palpitations.   Dr. Lau is multi-board certified in Internal Medicine, Echocardiography, Cardiovascular Diseases, and Clinical Cardiac Electrophysiology and is Registered in Vascular Interpretations.

Michael Liou, MD, FACC, FSCAI, is a skilled, board certified interventional cardiologist practicing at Chinatown Cardiology P.C., which has locations in Flushing, Brooklyn, Chinatown, and the Upper West Side of Manhattan. 

Dr. Liou earned his medical degree from SUNY Stony Brook School of Medicine after completing the prestigious Sophie Davis Biomedical Education Program at CUNY City College. He completed his internship and residency in internal medicine at NYU Langone Medical Center and performed his fellowship training in cardiovascular disease at Beth Israel Medical Center (now known as Mount Sinai Beth Israel) and returned to NYU Langone Medical Center for his advanced interventional cardiology subspecialty fellowship. 

Although he provides care for all cardiovascular conditions, Dr. Liou’s clinical expertise is in performing transradial cardiac catheterization, peripheral endovascular intervention, percutaneous mitral & aortic valvuloplasty, and ASD/PFO closure. He continues to participate in clinical research with a special focus on cardiovascular diseases affecting Asian Americans. 

Dr. Liou is multi-board certified in cardiovascular diseases, echocardiography, nuclear cardiology, and interventional cardiology.

Arsalan Rehmani, MD, FACC is an Interventional and General Cardiologist at Chinatown Cardiology P.C. Dr. Rehmani completed his residency at BronxCare Health System followed by subspecialty fellowships in cardiology and interventional cardiology at Mount Sinai Morningside Hospital. He is board-certified in multiple subspecialties including Internal Medicine, Cardiovascular Disease, Interventional Cardiology, Adult Echocardiography, and Nuclear Cardiology.



Dr. Rehmani accepts new patients, and he currently provides consultations at various locations in New York City, including the Upper West Side and Chinatown in Manhattan, Queens, Brooklyn, and the Bronx. Dr. Rehmani is multilingual, being fluent in English, Urdu, Hindi, Russian, and Ukrainian.

Dr. Jacqueline Chan received her Medical Degree from New York Medical College.   She completed her Internal Medicine residency in addition to a chief resident year at the former St. Vincent’s Catholic Medical Center.   Dr. Chan began her Cardiovascular Disease fellowship at St.   Vincent’s Catholic Medical Center and transitioned to New York Methodist Hospital to complete her clinical training.   She is proficient in exercise treadmill stress test, echocardiography, nuclear myocardial perfusion scan, and peripheral vascular duplex.   Dr. Chan completed training as a vein specialist and performs radiofrequency venous ablation in our ambulatory procedure lab.  Currently, she is the Medical Director of Echocardiography and Vascular Imaging for our accredited ICAEL and ACR facility.  Dr. Chan is multi-board certified in Internal Medicine, Echocardiography, Nuclear Cardiology, and Cardiovascular Diseases.

Tak Kwan, MD, FAHA, FACC, FACP, FSCAI, is a board-certified and internationally renowned cardiologist at Chinatown Cardiology, PC, in the Chinatown and Upper West Side areas of New York City, Brooklyn and Flushing, New York. Chief of Cardiology, Lenox Hill Greenwich Village, Northwell Health, Director, Asian Practice Initiatives at Lenox Hill Hospital, Clinical Professor of Medicine/Cardiology, Zucker School of Medicine at Hofstra/Northwell, and President, Chinatown Cardiology, P.C. Dr. Kwan earned his medical degree and completed his residency at the State University of New York Downstate Medical Center. For the past 20 years, Dr. Kwan has been an active member within the Chinese community. He served as the president of the Chinese-American Medical Society. He then went on to establish Chinatown Cardiology in order to assist those in the neighborhood. Due to his generous donations and charitable services for the community, Dr. Kwan was awarded the Ellis Island Medal of Honor in 2010.

Dr. Kwan is now the interventional cardiology director at Mount Sinai West, the catheterization laboratory co-director at Mount Sinai Beth Israel, and the affiliate medical director of international services at Mount Sinai Health. He is affiliated with Mount Sinai Beth Israel, serving as a professor at the Icahn School of Medicine, the executive director of Asian services, and the site program director of interventional cardiology. Besides being directly involved in patient care, Dr. Kwan is also an active participant in clinical research.

Dr. Kwan is recognized internationally as an expert in general and interventional cardiology. Not only is he incredibly skilled, but he is also a pioneer in transradial cardiac catheterization, complex percutaneous coronary intervention, structural heart intervention, and transpedal lower extremity peripheral catheterization. Dr. Kwan is committed to providing only the best treatment available to his patients. Whether the patient is seeking treatment for routine heart disorders or is suffering from more complex symptoms, Dr. Kwan has the experience and skills necessary to ensure that the proper care and attention are provided to every patient at Chinatown Cardiology.

For a highly skilled and knowledgeable cardiologist, make an appointment with Dr. Kwan either online or by phone today.

Jennifer Chen, MD, FACC, is a board-certified cardiologist specializing in internal medicine, echocardiography, nuclear cardiology, and cardiovascular diseases at Chinatown Cardiology, PC, in the Chinatown section of New York City and Brooklyn and Flushing, New York. Dr. Chen earned her undergraduate degree at the University of California, Berkeley. She then went on to complete her medical training at Albert Einstein College of Medicine in The Bronx, New York. She performed her residency at Mount Sinai Beth Israel and her fellowship at Lenox Hill Hospital. 

Dr. Chen only employs the latest technology to provide accurate diagnoses and up-to-date treatments. She utilizes cutting-edge imaging techniques to detect cardiovascular diseases. However, she is also skilled at using methods that have proven effective in the past, such as the exercise treadmill stress test, nuclear myocardial perfusion scans, and peripheral vascular duplex. Dr. Chen has received additional training as a vein specialist and performs radiofrequency ablation within the facility.  

Dr. Chen is committed to helping patients receive the care and attention they need. By combining the latest technology with her knowledge and pleasant demeanor, she can make patients feel confident that they are in the best care possible. To receive professional attention for any issue concerning the heart, make an appointment with Dr. Chen online or by phone today.

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. 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.

Dr. Timothy Jayasundera and his colleagues, Dr. Ralph Schlossman and 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. Schlossman earned his medical degree at New York University School of Medicine and Dr. Walsh completed her medical degree at State University of New York (SUNY) Buffalo School of Medicine and Biomedical Sciences.

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

Maged Boutros, MD, is obesity board-certified and a board-certified internist practicing at Prevention Clinics, which has locations in Maywood and Clifton, New Jersey. 

Dr. Boutros started developing a deep interest in integrative medicine and obesity medicine at the end of his fourth year of practice when he was doing his fellowship in anti-aging and integrative medicine. In addition to being a caring and pleasant doctor, he is a dynamic leader and serves on multiple hospital committees to help implement positive change. With nearly 20 years of clinical experience, Dr. Boutros has successfully assisted over 15,000 patients since 2003.

Since 2006, the weight loss program at Prevention Clinics has successfully treated many patients. Dr. Boutros continues to use evidence-based research results to modify the program when needed.

Building on this vast experience, Prevention Clinics offers the best in healthy, sustainable weight loss and maintenance programs, including lifestyle modification, appetite suppressants, HCG (sublingual or injections), nutritional plans, protein products, nutraceuticals, and supplements, all designed to help you lose and maintain your weight.

Dr. Boutros graduated from Saba University School of Medicine and completed his residency training in internal medicine primary care at Hackensack UMC Mountainside (now Mountainside Medical Center). He then went on to further his interests and career by pursuing fellowship training in integrative medicine and has been quadruple boarded.

Dr. Boutros is enthusiastic about providing the most optimal medical management for his patients, using a multi-disciplinary approach whenever possible so that they can resume their normal daily activities and continue to lead productive and satisfying lives. His treatment modalities are in strict accordance with the established protocols and expected standards of care. His compassionate care, clinical skills, and empathy have resulted in the outstanding reputation he maintains with his patients and referring physicians. He is accepting new patients at this time and will be happy to welcome you to Prevention Clinics.

Dr. Boutros treats a variety of medical conditions in the office, hospital, and in the comfort and convenience of the patient’s home.

He is currently active at Hackensack UMC. Dr. Boutros is also a fellow and board certified in the Academy of Anti-Aging and Regenerative Medicine and Obesity Medicine. Dr. Boutros treats patients ranging from adolescents to the elderly with a wide range of medical illnesses and in many different settings. He is extremely involved with the care of his patients and devotes his complete attention to each of them as he oversees all processes that contribute to the care of his patients. He sets a collaborative atmosphere in his office, where he leads and interacts with every member of his team to ensure the highest standards of medical care.

Dr. Boutros is the Medical Director of Prevention Clinics. He started these multi-specialty health care centers because of his comprehensive training, experience, and strong interest in integrative medicine, aesthetics, cosmetics, anti-aging, regenerative medicine, and obesity medicine. He offers medical and aesthetic services that include platelet-rich plasma (PRP), BOTOX® Cosmetic, JUVÉDERM®, mesotherapy/lipotherapy/lipo-dissolve, adult and adolescent weight management, anti-aging medicine/preventive medicine, and bio-identical hormone replacement therapy.

In hormone replacement therapy, Dr. Boutros has trained and is a fellow who is board certified by the American Academy of Anti-Aging and Regenerative Medicine.

Dr. Boutros speaks three (3) different languages and is dedicated to giving back to the community.

Dr. Demetrios Panagiotou serves patients of Bergen County at the Keystone Cardiovascular Center in Maywood and Edgewater, NJ. As a board-certified cardiologist, Dr. Panagiotou specializes in non-invasive cardiology. He’s experienced in preventive cardiology with hypertension and hyperlipidemia management, stress testing, cardiac arrhythmias, ischemic heart disease, congestive heart failure (systolic and diastolic), heart disease in renal failure patients, and advanced cardiac imaging for all cardiac conditions. His goal is to provide patients with highest quality care that is patient-centric and compassionate. He will help coordinate patient care and provide appropriate and dedicated referrals as needed for each individual patient. His goal is to provide the best possible treatment plan for all his patients.

After graduating from Carnegie Mellon University, he started his medical training at the Weill Cornell Medical College of Cornell University. Dr. Panagiotou then completed his Internal Medicine residency at New York University Hospital. He subsequently completed a general Cardiovascular Disease fellowship at Rutgers University-Robert Wood Johnson Hospital. Lastly, he pursued an additional cardiology fellowship in Nuclear Cardiology and Advanced Cardiac Imaging at the New York Presbyterian Hospital of Columbia University. Dr. Panagiotou is one of the few cardiologists in the tri-state area that is designated by the American Society of Hypertension as a Hypertension Specialist. Moreover, Dr. Panagiotou holds the distinction on being an expert in Cardiac PET imaging and stress testing..

Dr. Panagiotou has been appointed Assistant Professor of Cardiology and Internal Medicine at the Seton Hall University School of Medicine. Dr. Panagiotou has numerous publications and has presented at national and international conferences. This prestigious training has afforded Dr. Panagiotou with the capabilities to start his own cardiovascular practice at the Keystone Cardiovascular Center to provide the best healthcare possible to the patients of Bergen County and the surrounding metropolitan area, including Bergen County, Hudson County, Hackensack, Maywood, Glen Rock, Hawthorne, Westwood, Ridgewood, Paterson, Edgewater, North Bergen, Weehawkin, West New York.

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.

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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.

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.