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

Diane Hrivnak, O.T.

Occupational Therapy Assistant in Northville, MI · enumerated 2007.

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

National Provider Identifier

1285851550

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Registry record

Entity type Individual (Type 1)

Name Diane Hrivnak

Credential O.T.

Sex Female

Practice address Northville, MI, 48167

Phone (248) 349-9339

Fax (248) 349-9342

Enumeration date Apr 19, 2007

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

224Z00000X Occupational Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 5201003201 (MI) Primary

OT · Occupational Therapist: A licensed therapist helping patients develop or recover skills for daily living and working. About the OT credential

Other identifiers

Identifier	Type	State	Issuer
0H20094	Other	MI	BLUE CROSS BLUE SHIELD
0N58620	Other	MI	HAP
500573	Other	MI	PRIORITY HEALTH
16869	Other	MI	M-CARE
P00100555	Other	MI	MEDICARE RAILROAD
7543420	Other	MI	AETNA

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 Diane Hrivnak's NPI record?

Cross-check NPI 1285851550 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1285851550 active?

Yes, as of the latest NPPES snapshot, NPI 1285851550 is active (record last updated 2007-07-08).

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