Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael J Larkin, D.O.

Cardiovascular Disease Physician in Altoona, PA · enumerated 2006.

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

National Provider Identifier

1639147788

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael J Larkin

Credential D.O.

Sex Male

Practice address 1321 11th Avenue, Altoona, PA, 16601

Phone (814) 942-2411

Fax (814) 296-2040

Enumeration date Mar 14, 2006

Last updated in NPPES Dec 22, 2022

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License OS006874L (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
0013915700008	Medicaid	PA	-
0190440	Other	PA	HIGHMARK
0013915700007	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 specialty is Michael Larkin?

Michael Larkin is registered in NPPES with the primary taxonomy of Cardiovascular Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Mario Poon Cardiovascular Disease Physician · Altoona, PA NPI 1699744615 Craig Brandt Cardiovascular Disease Physician · Altoona, PA NPI 1760451546 Medhat Zaher Internal Medicine Physician · Altoona, PA NPI 1760438857 Laurie Smith Acute Care Nurse Practitioner · Altoona, PA NPI 1609962158

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-22.