Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William J Mitchell, MD

Specialist in Olympia, WA · enumerated 2005.

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

National Provider Identifier

1114908852

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Registry record

Entity type Individual (Type 1)

Name Dr. William J Mitchell

Credential MD

Sex Male

Practice address 500 Lilly Rd Ne, Suite 204, Olympia, WA, 98506

Phone (360) 413-8250

Fax (360) 413-8830

Enumeration date Nov 9, 2005

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

174400000X Specialist Other Service Providers · License A08530 (WA) Primary

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
MD00022796	Other	WA	MD LICENSE

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

What is the NPI number for William Mitchell?

The National Provider Identifier (NPI) for William Mitchell is 1114908852, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Mitchell practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.