Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ashya Rosetta Marie Williams

Peer Specialist in Riverside, CA · enumerated 2022.

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

National Provider Identifier

1285366831

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Registry record

Entity type Individual (Type 1)

Name Ashya Rosetta Marie Williams

Sex Female

Practice address 2155 Chicago Ave Ste 203, Riverside, CA, 92507

Phone (951) 357-6926

Fax (855) 568-2494

Enumeration date Jun 30, 2022

Last updated in NPPES Apr 23, 2025

Taxonomy & licenses

175T00000X Peer Specialist Other Service Providers · License MPSS-IJKNWQ (CA) 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 Ashya Williams practice?

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

What is the NPI number for Ashya Williams?

The National Provider Identifier (NPI) for Ashya Williams is 1285366831, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-23.