Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William M Ellis III, D.O.

Anesthesiology Physician in Alexandria, LA · enumerated 2005.

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

National Provider Identifier

1336132141

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Registry record

Entity type Individual (Type 1)

Name William M Ellis III

Credential D.O.

Sex Male

Practice address 211 4th St, Alexandria, LA, 71301

Phone (318) 473-3000

Enumeration date Aug 26, 2005

Last updated in NPPES Nov 5, 2025

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 020195 (LA) 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

Other identifiers

Identifier	Type	State	Issuer
1934518	Medicaid	LA	-
050022020	Other	-	RAILROAD MEDICARE

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

Where does William Ellis practice?

The practice location on file with NPPES is in Alexandria, LA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Ellis?

The National Provider Identifier (NPI) for William Ellis is 1336132141, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-05.