Ronald N. Kaleya, MD

Chief, Gastrointestinal Oncology

Maimonides Physician


General Surgery, Surgical Oncology, Trauma Surgery



About Me

Dr. Ronald Kaleya specializes in the treatment of pancreas, stomach and colorectal cancer, as well as gastrointestinal surgery. He recently joined the Maimonides surgical family to add depth to our expanded programs in pancreatic, gastric, colorectal and hepatobiliary oncologic surgery. This expanded program will include new surgical techniques with which to treat locally advanced and recurrent cancers, as well as those of the pancreas, stomach, liver and colon. Dr. Kaleya is board certified in General Surgery and completed a fellowship in Surgical Oncology. He comes from Montefiore Medical Center-Albert Einstein College of Medicine where he served as Professor of Clinical Surgery and Vice Chairman until 2008 and Westchester Medical Center-New York Medical College. He has been listed in Castle Connolly's Top Doctors List every year since its inception. Dr. Kaleya has many peer-reviewed publications, book chapters, and abstracts. He has participated in translation and bench research concerning extracellular matrix and tumor angiogenesis.

Areas of Expertise

  • Gastrointestinal Cancer Care
  • General Surgery
  • Outpatient Care - Bedford Avenue
  • Surgical Oncology
  • Trauma Surgery

Conditions Treated

  • Abdominal Cancers
  • Colorectal Cancer
  • Hepatocellular Cancer
  • Liver Cancer
  • Melanoma
  • Pancreatic Cancer
  • Stomach Cancer
  • Sarcomas


  • Colorectal Cancer Surgery
  • Gastrointestinal Surgery
  • Gastrectomy
  • Hepatobiliary Oncologic Surgery
  • Liver Surgery
  • Pancreatic Cancer Surgery
  • Pancreatectomy
  • Stomach Cancer Surgery


Medical Degree

Cornell University Weill Cornell Medical College


Montefiore Medical Center/Albert Einstein College of Medicine


Memorial Sloan-Kettering Cancer Center




  • Aetna
  • Affinity Health Plan
  • CenterLight
  • Centers Plan
  • Centivo
  • Cigna
  • ElderPlan
  • EmblemHealth
  • Empire Blue Cross Blue Shield
  • Empire Plan (United Healthcare)
  • Fidelis
  • Hamaspik
  • HealthFirst
  • Hotel Trades
  • Local 1199
  • MagnaCare
  • Medicaid
  • Medicare
  • MetroPlus
  • MultiPlan
  • Oxford
  • RiverSpring Health Plans
  • Tricare
  • United Healthcare
  • VillageCare Max
  • VNS Choice
  • Wellcare
  • WTC Health Program

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