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

Brendan Williams, DNP, CRNA

Certified Registered Nurse Anesthetist in Fontana, CA · enumerated 2024.

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

National Provider Identifier

1043058910

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Registry record

Entity type Individual (Type 1)

Name Brendan Williams

Credential DNP, CRNA

Sex Male

Practice address Fontana, CA, 92336

Phone (909) 255-2661

Enumeration date Jul 16, 2024

Last updated in NPPES Jul 30, 2024

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

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 95002423 (CA) Primary

163WC0200X Critical Care Medicine Registered Nurse Nursing Service Providers · License 834447 (CA) Secondary

DNP · Doctor of Nursing Practice: A clinical doctorate for advanced practice nurses. About the DNP 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

How do I verify Brendan Williams's NPI record?

Cross-check NPI 1043058910 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1043058910 active?

Yes, as of the latest NPPES snapshot, NPI 1043058910 is active (record last updated 2024-07-30).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-30.