Hematology and Oncology

Dr. Cohen

Bradley J. Cohen, MD

Dr. Cohen is Board Certified in Internal Medicine, Medical Oncology, and Hematology. He practices out of Hematology and Oncology in Nyack, NY. In addition to his clinical success, Dr. Cohen has been active in biomedical research throughout his career. He has given presentations and has authored many publications, with special interests that include lymphoma and thyroid heart disease.

Dr. Cohen earned his medical doctorate from the University of Medicine and Dentistry of New Jersey (UMDNJ) in Newark. He completed his Internship, Residency and Chief Residency in Internal Medicine at UMDNJ. In addition, he completed a Fellowship in Medicine at Cornell University Medical College in New York, and a Fellowship in Hematology and Medical Oncology at Memorial Sloan Kettering Cancer Center in New York.

Dr. Sung Ho Lee MD

Sung Ho Lee, MD

click here for Korean translation

Sung Ho Lee, MD, is a board-certified physician in medical oncology and hematology.

He practices at Highland Medical P.C., Hematology and Oncology at Montefiore Nyack Hospital in Nyack, NY. He also serves as Director of Clinical Research at Montefiore Nyack Hospital, bringing cutting-edge oncology therapies into the community.

Dr. Lee is also Assistant Professor of Medicine at New York Medical College in Valhalla, NY and speaks fluent Korean.

He received his medical doctorate as summa cum laude and completed his Internship at Kyunghee University Medical Center in Seoul, South Korea. He completed his Residency in Internal Medicine and postdoctoral training in Hematology and Medical Oncology at Montefiore Medical Center in Bronx, NY.

Prior to joining Highland Medical P.C., Dr. Lee worked at Metropolitan Hospital Center in New York, NY, where he was Medical Director of The Infusion Center. Dr. Lee also served as an attending physician and medical oncologist and hematologist at the Mayo Clinic Care Network’s Altru Cancer Center in Grand Forks, ND, where he was also an Assistant Professor in Medicine.

Dr. Lonberg

Matthew Lonberg, MD

Dr. Lonberg is a highly trained and dedicated hematologist and medical oncologist. Dr. Lonberg practices at Hematology and Oncology in Nyack, New York.  He has published many scientific articles on various topics in oncology and hematology.

Dr. Lonberg graduated Magna Cum Laude from the University of Pennsylvania with honors in Biochemistry. He earned his medical doctorate from the University of Virginia School of Medicine, where he was a member of the Alpha Omega Alpha Medical Honor Society. Dr. Lonberg completed his Internship and Residency in Medicine at New York University Hospital Medical Center at Bellevue Hospital in New York. In addition, he completed a Fellowship in Oncology Research at NYU, and a Fellowship in Hematology and Oncology at Memorial Sloan-Kettering Cancer Center in New York, where he received awards from the Charles H. Revson Foundation Fellowship in Biomedical Research and the American Cancer Society.

Dr. March

Robert J. March, MD

Dr. March is committed to providing his patients with excellent care in hematology and medical oncology in Rockland County and the surrounding areas. He is an attending physician in Hematology and Medical Oncology at Montefiore Nyack Hospital and Good Samaritan Hospital in Suffern. He is working at Hematology and Oncology in Nyack, NY. Dr. March is also active in biomedical research and has published numerous articles related to his fields of hematology and oncology.

Dr. March earned his medical doctorate from the American University of the Caribbean in Montserrat, British West Indies. He completed his Internship and Residency in Medicine at Bronx VA Medical Center at Mount Sinai Hospital in New York, followed by a Fellowship in Hematology and Medical Oncology at New York Medical College of Westchester County Medical Center in Valhalla, NY.

Dr. Rybalova

Irina Rybalova, MD

Dr. Rybalova is an experienced hematologist and medical oncologist committed to providing her patients with exceptional medical care. Board-certified in Internal Medicine, Medical Oncology, and Hematology, Dr. Rybalova is licensed to practice medicine in New York and New Jersey. She practices at Hematology and Oncology in Nyack, New York. 

Dr. Rybalova is dedicated to teaching, accomplished in scientific research, and a published author. She is currently a Volunteer Teaching Attending at Montefiore Medical Center and an Assistant Clinical Professor at Montefiore Medical Center/Albert Einstein School of Medicine. She also currently serves on the Board of Advisors for the Rockland County section of the American Cancer Society.

Dr. Rybalova earned her medical doctorate from Russian State Medical University in Moscow, Russia. During her education, Dr. Rybalova attended an international student exchange program at Harvard Medical School in Boston. After receiving her medical degree, she worked as a Staff Physician at Botkin Teaching Hospital of Russian State Medical University. 

Dr. Rybalova completed an Internship and Residency in Internal Medicine at the University of Medicine and Dentistry of New Jersey in Newark. In addition, she completed a Fellowship in Hematology and Medical Oncology at Montefiore Medical Center of Albert Einstein College of Medicine in Bronx, NY, and a Fellowship in the Alogeneic Bone Marrow Transplant Service at Memorial Sloan-Kettering Cancer Center in New York.

Dr. Zimmerman

Marc S. Zimmerman, MD

Dr. Zimmerman has 32 years of experience and practices in Internal Medicine, Hematology, Medical Oncology and Hematology and Oncology. He has been recognized with the Castle Connolly Top Doctors distinction which identifies the top physicians in the New York Metro Area who possess a high level of medical skill and expertise.

Dr. Zimmerman earned his medical doctorate from Albany Medical College. He remained at the Albany Medical Center for training in internal medicine as Chief Resident, Medical Oncology and Hematology. During this time he published papers on small cell lung cancer and colon cancer. Dr. Zimmerman has a special interest in lymphomas, myeloma and other hematologic malignancies and benign blood disorders.

When not caring for his patients, Dr. Zimmerman likes to be on a spin bike, in his garden or on the beach at Cape Cod.

Jennifer Wagner

Jennifer A Wagner, APRN, FNP, BC, AOCN

Jennifer Wagner, APRN, FNP, BC, AOCN is a board-certified Family Nurse Practitioner by the American Nurses Credentialing Center at Hematology and Oncology in Nyack, NY. She received her certification from the Oncology Nursing Society in Advanced Oncology of Nurse Practitioners and is certified in managing and accessing IV devices and mixing and administering chemotherapy medication.

Jennifer received her MSN as a Family Nurse Practitioner from Dominican College in Orangeburg, NY and her BSN of Nursing from Mount Saint Mary College in Newburgh, NY. She is a member of numerous professional organizations, including Nurse Practitioner Association of New York State, Oncology Nursing Society, Sigma Theta Tau International Honor Society of Nursing and Nurses Service Organization.