Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William R. Flinn, M.D.

Surgery Physician in Glen Burnie, MD · enumerated 2006.

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

National Provider Identifier

1801803200

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Registry record

Entity type Individual (Type 1)

Name Dr. William R. Flinn

Credential M.D.

Sex Male

Practice address 301 Hospital Dr, Glen Burnie, MD, 21061

Phone (410) 553-8300

Fax (410) 553-8349

Enumeration date Aug 1, 2006

Last updated in NPPES Sep 25, 2014

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License D44188 (MD) 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
52831003	Other	MD	BLUE SHIELD
0000529201	Medicaid	DE	-
0044	Other	MD	CAREFIRST REGIONAL
1057055	Other	MD	UNITED HLTHCARE NATIONAL
035921300	Medicaid	DC	-
1700881	Other	MD	UNITED HLTHCARE
112716	Other	MD	US HLTHCARE
1484482101	Medicaid	PA	-
083611700	Medicaid	MD	-
217056	Other	MD	MDIPA
214351	Other	MD	KAISER
80016	Other	MD	GEISINGER

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 William Flinn?

William Flinn is registered in NPPES with the primary taxonomy of Surgery 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-25.