Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mandy Grenier, BS

Addiction (Substance Use Disorder) Counselor in Tawas City, MI · enumerated 2017.

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

National Provider Identifier

1609395888

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Registry record

Entity type Individual (Type 1)

Name Mandy Grenier

Credential BS

Sex Female

Practice address Po Box 310, Tawas City, MI, 48764

Phone (989) 362-8636

Enumeration date Sep 19, 2017

Last updated in NPPES Sep 19, 2017

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers 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 Mandy Grenier?

The National Provider Identifier (NPI) for Mandy Grenier is 1609395888, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mandy Grenier practice?

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

Other providers at this practice address

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Tina Letson Community Health Worker · Tawas City, MI NPI 1346135761

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-09-19.