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

Mrs. Sandy Terwillegar, MA, LLP

Mental Health Counselor in Fremont, MI · enumerated 2007 · practices at Regional Psychology and Wellness, LLC.

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

National Provider Identifier

1629128202

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Registry record

Entity type Individual (Type 1)

Name Mrs. Sandy Terwillegar

Credential MA, LLP

Sex Female

Practice address Fremont, MI, 49412

Phone (231) 924-6920

Enumeration date Jan 12, 2007

Last updated in NPPES Feb 1, 2012

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 · License 6301009278 (MI) Primary

Other identifiers

Identifier	Type	State	Issuer
P108976660	Other	MI	BCBSM

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

How do I verify Sandy Terwillegar's NPI record?

Cross-check NPI 1629128202 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1629128202 active?

Yes, as of the latest NPPES snapshot, NPI 1629128202 is active (record last updated 2012-02-01).

Other providers at this practice address

Browse all →

Jim Vantreese Clinical Child & Adolescent Psychologist · Fremont, MI NPI 1871646307 Bunnita Ouwinga Counselor · Fremont, MI NPI 1033375357 Shanoa Praay Counseling Psychologist · Fremont, MI NPI 1306399746 Regional Psychology and Wellness, LLC Counseling Psychologist · Fremont, MI NPI 1154894376

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-01.