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

Anne Michele Mason, ARNP

Q: What is the NPI number for Anne Mason?

The National Provider Identifier (NPI) for Anne Mason is 1669780789, a Type 1 (individual) record in the CMS NPPES registry.

Psychiatric/Mental Health Nurse Practitioner in Walla Walla, WA · enumerated 2010.

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

National Provider Identifier

1669780789

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Registry record

Entity type Individual (Type 1)

Name Anne Michele Mason

Credential ARNP

Sex Female

Practice address Walla Walla, WA, 99362

Phone (509) 520-6418

Enumeration date Sep 23, 2010

Last updated in NPPES Sep 23, 2010

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

Taxonomy & licenses

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP30007187 (WA) Primary

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 Anne Mason practice?

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

What is the NPI number for Anne Mason?

The National Provider Identifier (NPI) for Anne Mason is 1669780789, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-09-23.