Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Leonard I Zon, MD

Individual provider Hematology & Oncology Physician · NPI 1245299197

Dr. Leonard I Zon, MD is a Hematology/Oncology in Boston, Massachusetts. Graduated from Jefferson Medical College of Thomas Jefferson University in 1983, 43 years ago. Accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
43
Trained at
Jefferson Medical College of Thomas Jefferson University
Licensed in
MA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

300 Longwood Ave Research Bldg Fl 7
Boston, MA 02115-5724
Phone: (617) 919-2069
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 55881 (MA)

Record details

NPI number1245299197
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 20, 2006
Last updated in NPPESJuly 13, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolJEFFERSON MEDICAL COLLEGE OF THOMAS JEFFERSON UNIVERSITY
Graduated 1983 (43 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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