Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. ELLEN KATHLEEN WILLIAMS MD
NPI 1912997446
Internal Medicine in Boston, MA

Q: What is Ellen Williams's NPI number?

The NPI number for Ellen Williams is 1912997446. It was assigned to this individual provider in the NPPES registry on October 26, 2005.

Q: What is Ellen Williams'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 Ellen Williams was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since October 26, 2005

15 PARKMAN ST, WAC 108, BOSTON, MA 02114(617) 726-2707(617) 724-0189 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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About Dr. Ellen Kathleen Williams Md NPPES

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

DR. ELLEN KATHLEEN WILLIAMS MD (NPI 1912997446) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (48986) and active in the NPI registry since October 2005.

NPPES Registry Identity

NPI1912997446

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. ELLEN KATHLEEN WILLIAMSCredential: MD

Location Address15 PARKMAN ST, WAC 108Boston, MA 02114-3117

Mailing AddressPo Box 9142, Mass General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894

Phone(617) 726-2707

Fax(617) 724-0189

Sole ProprietorNo

Enumeration DateOctober 26, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1912997446 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 · 48986

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.

15 PARKMAN ST, Boston, MA 02114

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