Dr. John P. Leonard | New York, NY | Oncology

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John Leonard specializes in oncology and internal medicine, focusing particularly on cancer care and comprehensive medical treatment. They graduated from the University of Virginia School of Medicine and brings 36 years of experience to patient care. John Leonard speaks English fluently.

Leonard practices at multiple NewYork Presbyterian locations throughout New York, including the Weill Cornell Medical Center and Columbia University Irving Medical Center, as well as NYU Tisch Hospital. They have extensive expertise in treating blood cancers such as non-Hodgkin lymphoma and AIDS-related lymphoma. Leonard performs diagnostic procedures including electrocardiograms and complete blood count tests to monitor patient health. Patients consistently rate their care highly, giving them an average rating of 4.6 out of 5 stars.

AI-generated from data on this provider profile.

accepting new patients
4.6

32 Ratings
36 years of experience
speaks English
University Of Virginia School Of Medicine
20 written reviews
2 specialties
24 areas of expertise
2 board certifications
8 hospital affiliations
10 office locations

Patients frequently praise Dr. Leonard for his exceptional knowledge, compassionate care, and ability to make them feel comfortable and well-informed about their treatments. Many appreciate his attentive listening, comprehensive explanations, and the reassurance he provides, often describing him as kind, supportive, and a top-notch professional. There were no negative comments in the dataset provided, highlighting a consistently positive patient experience with Dr. Leonard and his team.

AI-generated from the text of patient reviews

32 ratings & reviews

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Showing 1 to 10 of 20 reviews

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Very knowledgeable, conveys deep knowledge and patient care and compassion

January 30th, 2025

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Excellent Doctor..

October 29th, 2024

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I have been a patient of Dr Leonard s since 2012. I was diagnosed at another institution and the head of the lymphoma service said to do nothing. I was not comfortable with that answer so I requested a referral to a different doctor at a different hospital! I received 2 names one at Memorial Sloan Kettering and Dr Leonard at NYPresbyterian. I read the statement he wrote and knew he was the right doctor for me! When I met him he confirmed my first impression from his written statement. He tries to help everyone who sees him in the best way possible! I know Dr Leonard for twelve years and he is the sweetest kindest man and doctor! He has kept my lymphoma under control and it is always a pleasure to see him e eryn6 months! I give hime a 10 out of 10 rating! doctor!

September 14th, 2024

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I was diagnosed with low grade B cell lymphoma in 2004 at another hospital and underwent 5 months of chemo. A doctor friend referred me to Dr Leonard for a second opinion and I am very thankful. He spent a long time with me and was very compassionate and reassuring to this very scared patient. A year later lymphoma came back in the orbit of my left eye. He gave me all the options and we decided on immunotherapy maintenance with Rituxan, the least harmful option. I have been seeing him ever since and now he is like an old friend. He does blood work, checks my lymph nodes and my eye, and answers any questions. Then I go for my treatment. It is very routine and I am very grateful to have found him. It is now 20 years later and I am relatively healthy 78 year old and play picklenball 5 days a week!

June 1st, 2024

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He is wonderful! Thoughtful, clear and very supportive

May 23rd, 2024

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The best! Answers all your questions. You know you are in good hands.

May 16th, 2024

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A caring, calming, listening, intelligent, diligent, health professional. He and his staff are the best! They give me hope for living a full life with my chronic illness.

May 13th, 2024

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Dr Leonard is extremely knowledgeable and possesses perfect bedside manners. Makes you feel comfortable and in the right care! Thank you Dr Leonard!

April 10th, 2024

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Dr. Leonard is unfailingly informative, eficient and personable. I have complete confidence in him and am very grateful that I was referred to him.

February 15th, 2024

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Dr. Leonard and staff do great job caring for me and treating my cancer. Patient care is always thorough and he always has a smile when you need one. If you are looking for the best, he's the one.

October 23rd, 2023

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

Tel: (646) 962-2185

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

Newyork Presbyterian Weill Cornell Medical Center

525 E 68th StNew York, NY 10065

Tel: (212) 746-5454

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

Tel: (212) 312-5000

Newyork Presbyterian Allen Hospital

5141 BroadwayNew York, NY 10034

Tel: (212) 932-4000

Newyork Presbyterian Columbia University Irving Medical Center

630 W 168th StNew York, NY 10032

Tel: (212) 305-2500

New York Presbyterian Alexandra Cohen Hospital For Women And Newborns

1283 York Ave Fl 12New York, NY 10065

Tel: (212) 746-5454

Newyork Presbyterian Columbia University Irving Medical Center

622 W 168th StNew York, NY 10032

Tel: (212) 305-2500


Dr. John P. Leonard	Dr. Michael I. D'angelica, MD	Dr. Luc G. T. Morris, MD	Dr. Monica Kasbekar
Oncology	Oncology	Oncology	Oncology
Accepts New Patients	Accepts New Patients	Accepts New Patients	Accepts New Patients
4.6 (32 Ratings)	4.8 (22 Ratings)	3.7 (7 Ratings)	0 (0 Ratings)
36 Years of Experience	33 Years of Experience	22 Years of Experience	8 Years of Experience
No Virtual Visit Option	Virtual Visit Available	Virtual Visit Available	Virtual Visit Available
Speaks English	Speaks English	Speaks English
New York , NY	New York , NY	New York , NY	New York , NY
Med School: University Of Virginia School Of Medicine	Med School: Tufts University School of Medicine	Med School: New York University School of Medicine	Med School: Washington University In St Louis School Of Medicine
Current Profile	View Profile	View Profile	View Profile

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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

MEDICAL LICENSE

Medical Doctor, New York, 2026, Expired

EDUCATION & TRAINING

Medical School

University Of Virginia School Of MedicineGraduated in 1990

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How can I make an appointment with Dr. John Leonard?: You can find contact information for Dr. John Leonard here on Vitals.
Is Dr. John Leonard accepting new patients?: Dr. John Leonard is accepting new patients on Vitals. View Dr. John Leonard's profile on Vitals to make an appointment.
Does Dr. John Leonard accept my insurance?: You can see the insurance plans that Dr. John Leonard accepts on their Vitals profile.
What languages does Dr. John Leonard speak?: Dr. John Leonard speaks English.
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.

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