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Dr. Claire M Brett, MD

Anesthesiology Physician in San Francisco, CA · enumerated 2006.

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

National Provider Identifier

1861458598

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Registry record

Entity type Individual (Type 1)
Name Dr. Claire M Brett
Credential MD
Sex Female
Practice address 550 16th St Fl Hall5, Dept Anesthesia, Box 3216, San Francisco, CA, 94143
Phone (415) 637-4408
Enumeration date Apr 21, 2006
Last updated in NPPES Jan 31, 2017

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License G36606 (CA) Primary
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License G36606 (CA) Secondary
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
00G366060 Medicaid CA -

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

How do I verify Claire Brett's NPI record?
Cross-check NPI 1861458598 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1861458598 active?
Yes, as of the latest NPPES snapshot, NPI 1861458598 is active (record last updated 2017-01-31).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-01-31.