Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Keith Richard O'Brien, M.D.

Urology Physician in Bridgeport, CT · enumerated 2015.

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

National Provider Identifier

1740667815

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Registry record

Entity type Individual (Type 1)

Name Keith Richard O'Brien

Credential M.D.

Sex Male

Practice address 2600 Main St Ste 119, Bridgeport, CT, 06606

Phone (203) 338-8760

Enumeration date Apr 28, 2015

Last updated in NPPES Jul 15, 2020

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 64924 (CT) Primary

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

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

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 Keith O'Brien?

Keith O'Brien is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-15.