Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Mary J Thompson-Rottier, LPC

Mental Health Counselor in Fremont, MI · enumerated 2007.

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

National Provider Identifier

1841310489

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Registry record

Entity type Individual (Type 1)

Name Dr. Mary J Thompson-Rottier

Credential LPC

Sex Female

Practice address Fremont, MI, 49412

Phone (231) 923-8568

Fax (231) 722-3018

Enumeration date Mar 29, 2007

Last updated in NPPES Mar 10, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Primary

LPC · Licensed Professional Counselor: A licensed mental-health counselor providing psychotherapy. About the LPC 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

Where does Mary Thompson-Rottier practice?

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

What is the NPI number for Mary Thompson-Rottier?

The National Provider Identifier (NPI) for Mary Thompson-Rottier is 1841310489, 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 2020-03-10.