Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Brian P Sullivan, M.D.

Family Medicine Physician in Lancaster, PA · enumerated 2005 · practices at Lancaster General Medical Group.

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

National Provider Identifier

1164419131

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Registry record

Entity type Individual (Type 1)

Name Brian P Sullivan

Credential M.D.

Sex Male

Practice address 101 Abbeyville Rd, Lancaster, PA, 17603

Phone (717) 291-5991

Fax (717) 291-5806

Enumeration date Oct 4, 2005

Last updated in NPPES Aug 19, 2007

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD423238 (PA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
P006174	Other	PA	GATEWAY HEALTH PLAN
7996672	Other	PA	AETNA NON-HMO
1010754010001	Medicaid	PA	-
1622688	Other	PA	HIGHMARK BLUE SHIELD
1086443	Other	PA	AETNA HMO
107749 S1QD	Other	PA	GEISINGER HEALTH PLAN
I07849	Other	PA	HEALTH ASSURANCE
50036997	Other	PA	CAPITAL BLUE CROSS

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

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.

What specialty is Brian Sullivan?

Brian Sullivan is registered in NPPES with the primary taxonomy of Family Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-19.