Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Timothy William Grieve, CADC II

Mental Health Counselor in Gresham, OR · enumerated 2015 · practices at Native American Rehabilitation Assoc Inc.

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

National Provider Identifier

1558752717

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Registry record

Entity type Individual (Type 1)

Name Timothy William Grieve

Credential CADC II

Sex Male

Practice address 620 Ne 2nd St, Gresham, OR, 97030

Phone (971) 288-3121

Enumeration date Feb 10, 2015

Last updated in NPPES Mar 20, 2026

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 14-03-27 (OR) Secondary

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 19-QMHPC-00713 (OR) Primary

Other identifiers

Identifier	Type	State	Issuer
14-03-27	Other	OR	ACCBO/CADC II

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

Where does Timothy Grieve practice?

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

What is the NPI number for Timothy Grieve?

The National Provider Identifier (NPI) for Timothy Grieve is 1558752717, 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 2026-03-20.