Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Isabella Shari Riojas, PHD

Mental Health Counselor in Mountlake Terrace, WA · enumerated 2009.

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

National Provider Identifier

1851629968

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Registry record

Entity type Individual (Type 1)

Name Ms. Isabella Shari Riojas

Credential PHD

Sex Female

Practice address 6505 216th St Sw Ste 100, Mountlake Terrace, WA, 98043

Phone (509) 726-0192

Enumeration date Dec 1, 2009

Last updated in NPPES Mar 3, 2026

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License MHC.LH.70048562 (WA) Primary

104100000X Social Worker Behavioral Health & Social Service Providers Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Isabella Riojas?

Isabella Riojas is registered in NPPES with the primary taxonomy of Mental Health Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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