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

Dr. William S. Flanagan III, L.AC.

Acupuncturist in Corona Del Mar, CA · enumerated 2009 · practices at Madeline L Miller MD A Medical Corporation.

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

National Provider Identifier

1750524658

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Registry record

Entity type Individual (Type 1)
Name Dr. William S. Flanagan III
Credential L.AC.
Sex Male
Practice address Corona Del Mar, CA, 92625
Phone (949) 244-5170
Enumeration date Apr 8, 2009
Last updated in NPPES Apr 8, 2009

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

Taxonomy & licenses

171100000X Acupuncturist Other Service Providers · License 8590 (CA) Primary
171100000X Acupuncturist Other Service Providers · License 659 (HI) Secondary
LAC · Licensed Acupuncturist: A practitioner licensed to perform acupuncture. About the LAC 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

How do I verify William Flanagan's NPI record?
Cross-check NPI 1750524658 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1750524658 active?
Yes, as of the latest NPPES snapshot, NPI 1750524658 is active (record last updated 2009-04-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-08.