Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Mark Thomas, D.C.

Chiropractor in La Mirada, CA · enumerated 2005 · practices at William M. Thomas, D.C., Inc., A Chirorpactic Corporation.

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

National Provider Identifier

1609873082

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Registry record

Entity type Individual (Type 1)

Name Dr. William Mark Thomas

Credential D.C.

Sex Male

Practice address 15763 Imperial Hwy, La Mirada, CA, 90638

Phone (562) 943-4132

Fax (562) 304-2917

Enumeration date Jun 30, 2005

Last updated in NPPES Mar 10, 2008

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License DC24637 (CA) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier	Type	State	Issuer
ZZZ64074Z	Other	CA	BLUE SHIELD

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 William Thomas's NPI record?

Cross-check NPI 1609873082 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609873082 active?

Yes, as of the latest NPPES snapshot, NPI 1609873082 is active (record last updated 2008-03-10).

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William M. Thomas, D.C., Inc., A Chirorpactic Corporation Chiropractor · La Mirada, CA NPI 1346429131

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-10.