Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Margaret Mary Hallahan, D.O.

Hospice and Palliative Medicine (Internal Medicine) Physician in Huntingdon, PA · enumerated 2010.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1972818540

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Registry record

Entity type Individual (Type 1)

Name Margaret Mary Hallahan

Credential D.O.

Sex Female

Practice address Huntingdon, PA, 16652

Phone (814) 643-2290

Enumeration date Aug 8, 2010

Last updated in NPPES May 7, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License OS016316 (PA) Secondary

207RH0002X Hospice and Palliative Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License OS016316 (PA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
102826058	Medicaid	PA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Margaret Hallahan?

The National Provider Identifier (NPI) for Margaret Hallahan is 1972818540, a Type 1 (individual) record in the CMS NPPES registry.

Where does Margaret Hallahan practice?

The practice location on file with NPPES is in Huntingdon, PA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-05-07.