Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marissa Lynn Cosaert

Mental Health Counselor in Walla Walla, WA · enumerated 2026.

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

National Provider Identifier

1023975612

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Registry record

Entity type Individual (Type 1)

Name Marissa Lynn Cosaert

Sex Female

Practice address 5 W Alder St Ste 333, Walla Walla, WA, 99362

Phone (509) 529-4774

Enumeration date Jan 6, 2026

Last updated in NPPES Jan 6, 2026

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License MHCA.MC.70045905 (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.

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Frequently asked questions

What is the NPI number for Marissa Cosaert?

The National Provider Identifier (NPI) for Marissa Cosaert is 1023975612, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marissa Cosaert practice?

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

Other providers at this practice address

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Delia Frey Clinical Social Worker · Walla Walla, WA NPI 1972391951

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-06.