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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. 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.

Natalie Marks, MD, is a board-certified vascular surgeon who serves the community of Borough Park in Brooklyn, New York, at the Vascular Institute of New York. With more than 25 years of experience, Dr. Marks is passionate about using the latest advancements in medical technology to diagnose and treat a wide range of vascular conditions, including hypertension, peripheral arterial disease (PAD), venous leg ulcers, and diabetic vascular disease.

Growing up in Ukraine, Dr. Marks earned her Medical Doctorate from Crimea State Medical University in Simferopol, Ukraine. She later moved to the United States to complete her internal medicine residency at Maimonides Medical Center in Brooklyn. 

Dr. Marks is certified by both the American Board of Vascular Medicine and Internal Medicine. She also holds certifications from the National Alliance of Wound Care and Ostomy and in Diagnostic Medical Sonography (RDMS) for vascular technology.

In addition to her time at the Vascular Institute of New York, Dr. Marks is an attending physician at Brooklyn’s Maimonides Medical Center, New York Community Hospital, and NYU Langone Brooklyn Medical Center. She also belongs to a number of professional organizations, including the American College of Physicians and the American Society for Vascular Medicine.

Click here to read Dr. Natalie Marks' online profile.

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.

Arsalan Rehmani, MD, FACC, FSCAI 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, Nuclear Cardiology, Endovascular Medicine, and Cardiac CT.



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. 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.

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.

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.

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. Tung earned his Medical Degree from Loyola University Chicago Stritch School of Medicine. He completed his post-graduate training in Internal Medicine and Cardiology at North Shore- Long Island Jewish Medical Center. Dr. Tung is well-known for his sincere approach to patient care. He is an expert in all facets of non-invasive cardiology, including echocardiography, exercise treadmill stress test, nuclear myocardial perfusion scan, and peripheral vascular duplex (carotid, abdominal aorta, renal artery, and upper/lower extremity). Currently, he is the Medical Director of Nuclear Cardiology Imaging for our ICANL facility accreditation. Dr. Tung is board certified in Internal Medicine, Echocardiography, Nuclear Cardiology, Cardiovascular Diseases, and Cardiovascular CT.

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. 

Hari Polavarapu, MD, is a board-certified Internal Medicine and Primary Care provider at Tru Medical Management. Dr. Polavarapu, who also goes by “Dr. P,” sees patients at both practice locations in the Navy Hill and Williamsburg neighborhoods of Brooklyn, New York. He provides all his patients with outstanding conservative and preventive care.

Dr. Polavarapu is the founder of Tru Medical Management — a modern, comfort-driven primary care practice. Growing up in a medical family in India with philanthropic roots, Dr. Polavarapu has planted the seed to expand the goal of primary care, advance the medical care model, and improve access to health services.

His mission is to create a positive experience and inclusive environment for all patients. Tru Medical Management is dedicated to fulfilling the vision of high-quality, patient-centered primary care because they believe that better is possible.

Get started with Tru Medical Management today. Call the office to schedule your consultation or appointment. Online booking is also available and is fast and easy.

Maitri Patel, MD, is a board-certified internal medicine and aesthetics physician at PrudentMD in Iselin, New Jersey. She specializes in cosmetic procedures, internal medicine, laser hair removal, and much more. She’s also an expert in primary care services, including preventive health, chronic disease management, medical weight loss, and women’s health.

Dr. Patal received her medical training at the Maharaja Sayajirao University of Baroda in Vadodara, India, at the Muhlenberg Regional Medical Center in Plainfield, and the Robertwood Johnson Medical Center in New Brunswick, New Jersey. Dr. Patel is certified in laser hair removal, Botox®, dermal fillers, micro-needling, PRP (platelet rich plasma treatment), IV therapies and other cosmetic treatments. She has special interest in alternative therapies and continues to learn. She has helped many using such alternative therapies. She believes lifestyle changes and often alternative therapies make a bigger difference than allopathy alone. 

She has served for many years as an adult medicine physician at the Plainfield Community Health Center in Plainfield, New Jersey, the Tuberculosis Clinic of Union Counties in Elizabeth, New Jersey, and many other urgent care centers throughout New Jersey.

She also worked as a supervising physician for cardiac emergencies and nuclear cardiac stress tests before founding PrudentMD. Dr. Patel is board-certified by the American Board of Internal Medicine.

She is a HealthGrades Recognized Physician and was featured in the Top Internal Medicine Physicians list by the Consumer Research Council of America. Dr. Patel won the Patients’ Choice Award, On-Time Doctor Award, and Compassionate Doctor Recognition. She is listed among The Leading Physicians of the World and was voted America’s Most Compassionate Doctor.

Dr. Patel enjoys helping her patients look better, feel better, and achieve the highest quality of life possible. She speaks English, Hindi, and Gujarati. In her free time, she enjoys spending time with family and friends.

Dr. Patel warmly welcomes her patients to PrudentMD and looks forward to exceeding their expectations.

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