NPI Portal NPI Lookup & Verification

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

Bruce Flagg, D.O.

General Practice Physician in San Francisco, CA · enumerated 2012.

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

National Provider Identifier

1457627853

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Registry record

Entity type Individual (Type 1)
Name Bruce Flagg
Credential D.O.
Sex Male
Practice address San Francisco, CA, 94109
Phone (650) 898-7604
Fax (650) 851-0931
Enumeration date Mar 29, 2012
Last updated in NPPES Mar 27, 2013

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

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License R20A5309 (CA) 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

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 NPI 1457627853 active?
Yes, as of the latest NPPES snapshot, NPI 1457627853 is active (record last updated 2013-03-27).
How do I verify Bruce Flagg's NPI record?
Cross-check NPI 1457627853 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-03-27.