What is Diana Gallagher's NPI number?

Diana Gallagher's National Provider Identifier (NPI) is 1356331433, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Diana Gallagher's specialty?

Diana Gallagher is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).

Where is Diana Gallagher located?

Diana Gallagher's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.

What is Diana Gallagher's phone number?

The practice phone number listed in the NPPES registry for Diana Gallagher is (617) 726-3734.

Is Diana Gallagher's NPI active?

Yes — Diana Gallagher's NPI (1356331433) is active in the NPPES registry as of the last update on 2025-09-11.

IndividualActive

Diana Gallagher, MD

NPI 1356331433 · Internal Medicine Physician · Boston, MA

Diana Gallagher, MD is a Internal Medicine Physician provider in Boston, MA (NPI 1356331433).

Provider details

NPI number: 1356331433
Entity type: Individual
Primary specialty: Internal Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Female
License: 210388 (MA)

Specialties & taxonomies

Internal Medicine PhysicianPrimary207R00000XLicense 210388 (MA)
Allopathic & Osteopathic Physicians
Pulmonary Disease Physician207RP1001XLicense 210388 (MA)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(91/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
20 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

55 Fruit St

Bul 148

Boston, MA 02114-2621

Phone: (617) 726-3734

Fax: (617) 726-6878

Street-level locationGet directions

More MA providers

Mailing address

Po Box 9142

Charlestown, MA 02129-9142

Enumerated: 2005-10-28
Last updated: 2025-09-11

Frequently asked questions

What is Diana Gallagher's NPI number?: Diana Gallagher's National Provider Identifier (NPI) is 1356331433, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Diana Gallagher's specialty?: Diana Gallagher is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
Where is Diana Gallagher located?: Diana Gallagher's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.
What is Diana Gallagher's phone number?: The practice phone number listed in the NPPES registry for Diana Gallagher is (617) 726-3734.
Is Diana Gallagher's NPI active?: Yes — Diana Gallagher's NPI (1356331433) is active in the NPPES registry as of the last update on 2025-09-11.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.