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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DAVID CHRISTIAN HARMON
NPI 1851358352
Internal Medicine - Hematology & Oncology in Boston, MA

Active since April 27, 2006
55 FRUIT ST YAW 7, MASS GENERAL HOSPITAL, BOSTON, MA 02114(617) 726-8748 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About David Christian Harmon NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DAVID CHRISTIAN HARMON (NPI 1851358352) is an individual hematology & oncology provider in Boston, Massachusetts, licensed in Massachusetts (44555) and active in the NPI registry since April 2006.

NPPES Registry Identity

NPI1851358352
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDAVID CHRISTIAN HARMON
Location Address55 FRUIT ST YAW 7, MASS GENERAL HOSPITALBoston, MA 02114-2696
Mailing AddressPo Box 9142, Mass General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894
Phone(617) 726-8748
Sole ProprietorNo
Enumeration DateApril 27, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1851358352 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in MA · 44555
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
55 FRUIT ST YAW 7, Boston, MA 02114
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Other Identifiers 1

Medicaid2074796MA

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. NOOPUR SURESH RAJE MD
Internal Medicine (Medical Oncology)
55 FRUIT ST YAW 7, HEMATOLOGY/ONCOLOGY
BOSTON, MA 02114
Suffolk County (617) 724-4000
DR. PHILIP CRAWFORD AMREIN MD
Internal Medicine (Medical Oncology)
55 FRUIT ST YAW 7, HEMATOLOGY ONCOLOGY
BOSTON, MA 02114
Suffolk County (617) 726-8748
DR. EUNICE L KWAK MD, PHD
Internal Medicine (Medical Oncology)
55 FRUIT ST YAW 7, HEMATOLOGY/ONCOLOGY
BOSTON, MA 02114
Suffolk County (617) 726-6254
DR. MATTHEW VANDERHEIDEN MD PHD
Internal Medicine (Hematology & Oncology)
55 FRUIT ST YAW 7, MASSACHUSETTS GENERAL HOSPITAL
BOSTON, MA 02114
Suffolk County (617) 724-2241
DR. RACHEL P ROSOVSKY MD
Internal Medicine (Hematology & Oncology)
55 FRUIT ST YAW 7
BOSTON, MA 02114
Suffolk County (617) 726-8743

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is David Harmon's NPI number?

The NPI number for David Harmon is 1851358352. It was assigned to this individual provider in the NPPES registry on April 27, 2006.

Where is David Harmon located?

David Harmon practices at 55 Fruit St Yaw 7 Mass General Hospital, Boston, MA 02114. The listed phone number is (617) 726-8748.

What is David Harmon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for David Harmon was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.