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

DR. JAMES JOSEPH DINEEN MD
NPI 1821076654
Internal Medicine in Boston, MA

Q: What is James Dineen's NPI number?

The NPI number for James Dineen is 1821076654. It was assigned to this individual provider in the NPPES registry on January 3, 2006.

Q: What is James Dineen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for James Dineen 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 37 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.

Active since January 03, 2006

MASS GENL HOSP, WANG ACC 5, BOSTON, MA 02114(617) 724-6660(617) 724-6632 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dr. James Joseph Dineen Md NPPES

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

DR. JAMES JOSEPH DINEEN MD (NPI 1821076654) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (31419) and active in the NPI registry since January 2006.

NPPES Registry Identity

NPI1821076654

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. JAMES JOSEPH DINEENCredential: MD

Location AddressMASS GENL HOSP, WANG ACC 5Boston, MA 02114-3130

Mailing AddressPo Box 9142Charlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894

Phone(617) 724-6660

Fax(617) 724-6632

Sole ProprietorNo

Enumeration DateJanuary 3, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1821076654 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in MA · 31419

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

MASS GENL HOSP, Boston, MA 02114

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Other Identifiers 3

Medicaid2008262MA

OtherB33283MA · Bcbs Ma

Other031419MA · Tufts Health Plan

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 James Dineen's NPI number?

The NPI number for James Dineen is 1821076654. It was assigned to this individual provider in the NPPES registry on January 3, 2006.

Where is James Dineen located?

James Dineen practices at Mass Genl Hosp Wang Acc 5, Boston, MA 02114. The listed phone number is (617) 724-6660.

What is James Dineen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for James Dineen 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 37 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.