Summary

John Leonard sees patients for impaired immunity, hydrarthrosis, and anemia of chronic disease, and performs PET scan and PET-CT scan procedures. They practice oncology and internal medicine and have 36 years of experience.

Leonard is affiliated with NewYork-Presbyterian Weill Cornell Medical Center, NewYork-Presbyterian Allen Hospital, NewYork-Presbyterian Columbia University Irving Medical Center, NewYork-Presbyterian Lower Manhattan Hospital, NewYork-Presbyterian Alexandra Cohen Hospital for Women and Newborns, NYU Tisch Hospital, and NYU Langone Hospital Kimmel Pavilion, and sees patients in New York, NY. They earned their medical degree from the University of Virginia School of Medicine. Patients on Vitals rate John Leonard 4.62 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.6
  • 36 years of experience
  • speaks English
  • University Of Virginia School Of Medicine
  • 20 written reviews
  • 2 specialties
  • 24 areas of expertise
  • 8 hospital affiliations
  • 10 office locations

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. John P. Leonard has 10 locations

Weill Cornell Medicine Center For Blood Disorders

520 E 70th StNew York, NY 10021
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
Wed9:00 am - 5:00 pm
Thu9:00 am - 5:00 pm
Fri9:00 am - 5:00 pm
SatClosed
SunClosed

Weill Cornell Medicine Neuro Oncology

1305 York Ave Fl 10New York, NY 10021
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
Wed9:00 am - 5:00 pm
Thu9:00 am - 5:00 pm
Fri9:00 am - 5:00 pm
SatClosed
SunClosed

Dr. John P. Leonard

520 East 70th Street, Starr Pavilion, 3rd FloorNew York, NY 10021

Dr. John P. Leonard

520 East 70th Street Starr Pavilion, 3rd FloorNew York, NY 10021

Newyork Presbyterian Lower Manhattan Hospital

170 William StNew York, NY 10038

New York Presbyterian Alexandra Cohen Hospital For Women And Newborns

1283 York Ave Fl 12New York, NY 10065

Compare with Similar Doctors

Dr. John P. Leonard
Adam J. Schoenfeld, MD
Deaglan Mchugh, MD
Charles M. Rudin, MD, PhD
Dr. John P. LeonardAdam J. Schoenfeld, MDDeaglan Mchugh, MDCharles M. Rudin, MD, PhD
OncologyOncologyOncologyOncology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.6 
0 
5 
3.5 
36 Years of Experience 12 Years of Experience 17 Years of Experience 33 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English Speaks English Speaks English Speaks English
New York , NYNew York , NYNew York , NYNew York , NY
Med School: University Of Virginia School Of Medicine Med School: University of California San Francisco Med School: University of Dublin Trinity College Dublin Med School: University of Chicago
Current Profile
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Insurance Plans Accepted by Dr. John P. Leonard

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. John P. Leonard has the following 2 specialties

Specialty Expertise

Dr. John P. Leonard has the following 24 areas of expertise

  • Acute Myeloid Leukemia
  • Adult T-Cell Leukemia-Lymphoma
  • Antiphospholipid Syndrome (APS)
  • B-Cell Lymphoma (CBCL)
  • Bone Marrow and Lymphatic Tissue Cancer (Hematologic Neoplasm)
  • Cancer
  • Chemotherapy
  • Chronic B-Cell Lymphocytic Leukemia
  • Chronic Myeloid Leukemia
  • Chronic Myelomonocytic Leukemia
  • Colon Cancer
  • Deep Vein Thrombosis
  • Diffuse Large B-Cell Lymphoma
  • Hepatitis C
  • Hodgkin Disease
  • Internal Medicine
  • Leukemia
  • Local Neoplasm Recurrence
  • Lymphoma
  • Mantle-Cell Lymphoma (Non-Hodgkin Lymphoma)
  • Metastasis
  • Multiple Myeloma (Cancer of Plasma Cells)
  • Non-Hodgkin Lymphoma
  • Radioimmunotherapy

Certifications, License, & Education

36 Years Experience

Dr. John P. Leonard holds an expired medical license in the state of New York.

Medical License

Medical Doctor with an expired medical license in the state of New York that expired in 2026.

Education & Training

Medical School

Graduated from University Of Virginia School Of Medicine in 1990.

NPI Number

Dr. Leonard's NPI number is 1992892079.

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Frequently Asked Questions

Where is Dr. John Leonard's office located?
Dr. John Leonard's office is located at 520 E 70th St, New York, NY, 10021.
Does Dr. John Leonard accept virtual/telehealth appointments?
Dr. John Leonard has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. John Leonard?
You can find contact information for Dr. John Leonard here on Vitals.
What languages does Dr. John Leonard speak?
Dr. John Leonard speaks English.
Which hospitals is Dr. John Leonard affiliated with?
Dr. John Leonard is affiliated with Newyork Presbyterian Weill Cornell Medical Center, Newyork Presbyterian Allen Hospital, Newyork Presbyterian Columbia University Irving Medical Center, Newyork Presbyterian Lower Manhattan Hospital, Newyork Presbyterian Alexandra Cohen Hospital For Women And Newborns, Newyork Presbyterian Columbia University Irving Medical Center, Nyu Tisch Hospital, and Nyu Langone Hospital Kimmel Pavilion.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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