Overview
John Leonard is a Hematologist Oncology specialist and an Oncologist in New York, New York. Dr. Leonard has been practicing medicine for over 30 years and is rated as an Experienced provider by MediFind in the treatment of Splenomegaly. His top areas of expertise are Non-Hodgkin Lymphoma, Follicular Lymphoma, Mantle Cell Lymphoma (MCL), Diffuse Large B-Cell Lymphoma (DLBCL), and Bone Marrow Transplant.
His clinical research consists of co-authoring 233 peer reviewed articles and participating in 3 clinical trials. MediFind looks at clinical research from the past 15 years.
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- HMO
- INDEMNITY
- POS
- PPO
- OTHER MEDICAID
- STATE MEDICAID
- EPO
- HMO
- POS
- PPO
Locations
520 E 70th St, Suite 651, New York, NY 10021
111 Broadway, New York, NY 10006
240 E 38th St, New York, NY 10016
Clinical Research
Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.
3 Clinical Trials
Icahn School Of Medicine At Mount Sinai
John Mascarenhas is a Hematologist Oncology specialist and a Hematologist in New York, New York. Dr. Mascarenhas is rated as an Elite provider by MediFind in the treatment of Splenomegaly. His top areas of expertise are Myelofibrosis, Myeloproliferative Neoplasms (MPN), Polycythemia Vera, Bone Marrow Aspiration, and Splenectomy.
Icahn School Of Medicine At Mount Sinai
Douglas Tremblay is a Hematologist and a Hospital Medicine provider in New York, New York. Dr. Tremblay is rated as an Elite provider by MediFind in the treatment of Splenomegaly. His top areas of expertise are Myelofibrosis, Myeloproliferative Neoplasms (MPN), Polycythemia Vera, Bone Marrow Aspiration, and Bone Marrow Transplant.
Icahn School Of Medicine At Mount Sinai
Ilan Shapira is a Hematologist Oncology specialist and an Oncologist in New York, New York. Dr. Shapira is rated as a Distinguished provider by MediFind in the treatment of Splenomegaly. His top areas of expertise are Thrombocytopenia, Myelodysplastic Syndrome (MDS), Large-Cell Immunoblastic Lymphoma, and Adult Immune Thrombocytopenia.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Elite
- B-Cell LymphomaDr. Leonard isElite. Learn about B-Cell Lymphoma.
- Diffuse Large B-Cell Lymphoma (DLBCL)
- Follicular LymphomaDr. Leonard isElite. Learn about Follicular Lymphoma.
- Mantle Cell Lymphoma (MCL)Dr. Leonard isElite. Learn about Mantle Cell Lymphoma (MCL).
- Non-Hodgkin LymphomaDr. Leonard isElite. Learn about Non-Hodgkin Lymphoma.
- Distinguished
- Chronic B-Cell Leukemia (CBCL)Dr. Leonard isDistinguished. Learn about Chronic B-Cell Leukemia (CBCL).
- Chronic Lymphocytic Leukemia (CLL)Dr. Leonard isDistinguished. Learn about Chronic Lymphocytic Leukemia (CLL).
- Gastric LymphomaDr. Leonard isDistinguished. Learn about Gastric Lymphoma.
- Hodgkin LymphomaDr. Leonard isDistinguished. Learn about Hodgkin Lymphoma.
- Lymphofollicular HyperplasiaDr. Leonard isDistinguished. Learn about Lymphofollicular Hyperplasia.
- Marginal Zone Lymphoma (MZL)Dr. Leonard isDistinguished. Learn about Marginal Zone Lymphoma (MZL).
- Advanced
- AgranulocytosisDr. Leonard isAdvanced. Learn about Agranulocytosis.
- Anaplastic Large Cell LymphomaDr. Leonard isAdvanced. Learn about Anaplastic Large Cell Lymphoma.
- Bone Marrow TransplantDr. Leonard isAdvanced. Learn about Bone Marrow Transplant.
- Classical Hodgkin LymphomaDr. Leonard isAdvanced. Learn about Classical Hodgkin Lymphoma.
- Febrile NeutropeniaDr. Leonard isAdvanced. Learn about Febrile Neutropenia.
- Large-Cell Immunoblastic LymphomaDr. Leonard isAdvanced. Learn about Large-Cell Immunoblastic Lymphoma.
- Experienced
- Acute Myeloid Leukemia (AML)Dr. Leonard isExperienced. Learn about Acute Myeloid Leukemia (AML).
- Adult T-Cell LeukemiaDr. Leonard isExperienced. Learn about Adult T-Cell Leukemia.
- Chronic Familial NeutropeniaDr. Leonard isExperienced. Learn about Chronic Familial Neutropenia.
- Chronic T-Cell Leukemia (CTCL)Dr. Leonard isExperienced. Learn about Chronic T-Cell Leukemia (CTCL).
- Gaucher DiseaseDr. Leonard isExperienced. Learn about Gaucher Disease.
- IgG4-Related DiseaseDr. Leonard isExperienced. Learn about IgG4-Related Disease.