John P. Leonard, MD

Medical Oncology (Board Certified, Primary Specialty)
Hematology (Board Certified)
Office Phone: (646) 962-2068
One of America's Top Doctors
Rated one of New York Magazine's Best Doctors


Our center provides access to the full array of resources needed for "comprehensive" cancer care. This includes nutrition, psychosocial support, complementary medicine, rehabilitation, pain management, and other areas. We have developed an outstanding team of physicians (including medical oncologists, radiation oncologists, pathologists, and others), nurses, physician assistants and related health care personnel in order to optimally serve patients with these disorders.

Our patients recognize the value of this support. The hematopathology group (responsible for diagnosing and evaluating biopsies of lymphomas and other blood cancers) is among the best and largest of any academic medical center. They are widely recognized for their diagnostic and research expertise, and in fact have a significant role in educating other hematopathology specialists.

Area of Expertise

Please contact the doctor's office to verify that your insurance is accepted.

Aetna [HMO, Medicare, PPO]

Aetna [Weill Cornell Employee Plan]

Affinity [Access (Exchange)]

Affinity [HMO]


Emblem Select Care


Empire Blue Cross Blue Shield [Blue Priority, Child Health Plus, EPO, HMO, Mediblue (Senior), Pathway (Exchange), PPO]

Empire Blue Cross Blue Shield [Pathway Enhanced]

Empire Blue Cross Blue Shield HealthPlus

Fidelis Care





Oxford Health Plans [Freedom, Liberty, Medicare Advantage]

Oxford Health Plans [Metro/Core/Charter (HMO)]


Rockefeller University - CoreSource

United Empire

UnitedHealthcare [Community Plan, Compass (Exchange), EPO, HMO, Medicare, POS, PPO]



1990 University of Virginia School of Medicine

Internship: 1991 NewYork-Presbyterian Hospital/Weill Cornell Medical Center

Residency: 1993 NewYork-Presbyterian Hospital/Weill Cornell Medical Center

Fellowship: 1995 NewYork-Presbyterian Hospital/Weill Cornell Medical Center


525 East 68th Street Payson Pavilion 3
New York, NY 10065

Phone: (646) 962-2068

Fax: (646) 962-1605

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Professor of Medicine at Weill Cornell Medical College