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

Individual provider Medical Oncology Physician · NPI 1164910519

Leon Pappas, MD, PHD is an Internal Medicine in Boston, Massachusetts. Graduated from Boston University School of Medicine in 2018, 8 years ago. Practices with Brigham and Womens Physicians Organization Inc, a 2,916-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
8
Trained at
Boston University School of Medicine
Licensed in
MA
In the registry since
2018
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

55 Fruit St
Boston, MA 02114-2621
Phone: (617) 643-0596
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 75 Francis St, Boston, MA 02115-6110 — (617) 732-5500

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 1016384 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 1016384 (MA)

Record details

NPI number1164910519
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedMay 1, 2018
Last updated in NPPESFebruary 10, 2026
Certification dateFebruary 10, 2026
Mailing address55 Fruit St, Boston, MA 02114-2621

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolBOSTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice Brigham And Womens Physicians Organization Inc — 2916 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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