Dr. John Leonard, MD

Dr. John Leonard, MD

Medical Oncology  ·  
Male  ·  
52 y/o

Accepting new patients

Dr. John Leonard, MD is a medical oncology specialist in New York, NY and has been practicing for 23 years. He specializes in medical oncology and hematology.

Weill Cornell Medical Center

520 E 70th St # Starrpavilion

New York, NY 10021
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Insurance Accepted

  • Aetna
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield of Louisiana
  • Blue Cross Blue Shield of Massachusetts
  • Capital District Physician's Health Plan (CDPHP)
  • Cigna
  • EmblemHealth
  • Empire Blue Cross Blue Shield
  • HealthFirst
  • Humana

Learn about Dr. Leonard

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you.


Top Care Areas

See how frequently Dr. Leonard performs your care needs compared to other doctors.

Non-Hodgkin's Lymphoma
very high
more than 99% of peers
All Lymphoma
very high
more than 99% of peers
Nodular Lymphoma
very high
more than 97% of peers

Dr. Leonard's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

Care Philosophy

This content was provided by Dr. Leonard "We are not a "factory" or a "machine", moving patients through as if they are boxes in a warehouse. Instead we provide personalized and compassionate care that is state of the art.  We take the time to get to know our patients, and partner with them to devise the best available evaluation and treatment program.  While we are well aware of "guidelines", "treatment algorithms", and "institutional programs and regimens", we focus on what is best for the individual patient rather than a cookbook.

Patients seek treatment here because they are referred here by their physicians, who recognize our expertise and know that across the region and the country we are a "go to" place to seek the best lymphoma care.  Our physicians are internationally recognized for clinical skill, research, and personal qualities.  In fact, we care for a substantial number of individual physicians (or their family members) who are themselves dealing with lymphoma.  

Cancer patients don't always (or unfortunately won't always) just have cancer - they have multiple other complex medical problems that may be active concurrently with or exacerbated by cancer treatment.  Weill Cornell Medical College physicians are among the best across all medical specialties, not just cancer.  New York Presbyterian Hospital is one of the top hospitals in the nation.  This can be particularly valuable in patients dealing with issues such as cardiology, pediatrics, obstetrics and gynecology, neurology, endocrinology, lung and kidney issues.  Patients do not want to have to be sent to another hospital or center should their other medical issues become a problem in the midst of cancer treatment.  They want access to the best specialists if needed, all in one place, in a coordinated fashion.  

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."

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2  Specialties

  • Medical Oncology
  • Hematology

2  Board Certifications

  • Hematology
    Accredited by: American Board of Internal Medicine*
  • Medical Oncology
    Accredited by: American Board of Internal Medicine*

66  Conditions Treated

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3  Procedures

  • Bone Marrow Biopsy
  • Cardiac MRI (Magnetic Resonance Imaging) of Heart or Chest
  • Plasmapheresis

Background Check

0 Malpractice Claims

No malpractice history found for New York.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • University of Virginia / Main Campus
    Medical School | Graduated 1990
  • Newyork-Presbyterian Hospital-Weill Cornell Medical Center
    Internship Hospital | Completed 1991
  • Newyork-Presbyterian Hospital-Weill Cornell Medical Center
    Residency Hospital | Completed 1993
  • Newyork-Presbyterian Hospital-Weill Cornell Medical Center
    Fellowship Hospital | Completed 1995

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Leonard has no media or publications listed.

Languages Spoken

  • English
  • Hungarian

Memberships & Professional Affiliations

Dr. Leonard does not have any memberships or affiliations listed. If you are Dr. Leonard and would like to add memberships or affiliations, please update your profile.

Dr. Leonard's Reviews

Likelihood of recommending Dr. Leonard to family and friends
8 total reviews

Likelihood to Recommend (8)

  • 5
  • 4
  • 3
  • 2
  • 1

Dr. Leonard's Performance

  • Trustworthiness

  • Explains condition(s) well

  • Answers questions

  • Time well spent


Office & Staff Performance

  • Scheduling

  • Office environment

  • Staff friendliness

  • Average wait time

    10 to 15 minutes
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