Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Stephanie Jo Grinstead

Physical Therapy Assistant in Muskegon, MI · enumerated 2006.

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

National Provider Identifier

1467548974

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Registry record

Entity type Individual (Type 1)

Name Mrs. Stephanie Jo Grinstead

Sex Female

Practice address 1712 Holton Road, Suite B, Muskegon, MI, 49445

Phone (231) 719-1921

Fax (231) 719-9470

Enumeration date Oct 4, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

225200000X Physical Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License DIPLOMA ONLY (MI) Primary

Other identifiers

Identifier	Type	State	Issuer
30609	Other	MI	BCBS
4717630	Medicaid	MI	-

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

What specialty is Stephanie Grinstead?

Stephanie Grinstead is registered in NPPES with the primary taxonomy of Physical Therapy Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.