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

Dr. Stephen R Brennan, D.O.

Pediatrics Physician in York, ME · enumerated 2006 · practices at Stephen R. Brennan, D.O., P.A..

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

National Provider Identifier

1043226236

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen R Brennan

Credential D.O.

Sex Male

Practice address York, ME, 03909

Phone (207) 363-5437

Fax (207) 351-1722

Enumeration date Jul 31, 2006

Last updated in NPPES Jul 9, 2007

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

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 1333 (ME) 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
2375017	Other	TX	AETNA
9022900	Other	PA	CIGNA NATIONAL
00007M	Other	ME	ANTHEM BLUE CROSS MAINE
121460C	Other	NH	CIGNA HC NH
ME0081	Other	MA	HARVARD PILGRIM HC
30220763	Medicaid	NH	-
027530	Other	ME	ANTHEM BX MAINE
040854YPME 01	Other	NH	MATTHEW THORNTON BLUE NH
E39853	Other	NH	ANTHEM BX NH
CIGNA	Other	ME	M52711C

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.

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Frequently asked questions

What specialty is Stephen Brennan?

Stephen Brennan is registered in NPPES with the primary taxonomy of Pediatrics 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

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Rosemary Greenwood Mental Health Counselor · York, ME NPI 1588788590 Stephen R. Brennan, D.O., P.A. Pediatrics Physician · York, ME NPI 1609033422

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.