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

Mark A Zaroff, PHD

Counselor in Saginaw, MI · enumerated 2006.

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

National Provider Identifier

1932286911

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Registry record

Entity type Individual (Type 1)

Name Mark A Zaroff

Credential PHD

Sex Male

Practice address Saginaw, MI, 48603

Phone (989) 799-2100

Fax (989) 799-2637

Enumeration date Nov 1, 2006

Last updated in NPPES Sep 11, 2025

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

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers · License 6401003279 (MI) Primary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 6301012326 (MI) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
0995595	Other	MI	HEALTHPLUS
730195	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.

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Frequently asked questions

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.

What specialty is Mark Zaroff?

Mark Zaroff is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Robert Cooper Mental Health Counselor · Saginaw, MI NPI 1992755318 Frances Erwin Social Worker · Saginaw, MI NPI 1730291014 Chalichama Rao Psychiatry Physician · Saginaw, MI NPI 1003908054 Nathalie Menendes Psychologist · Saginaw, MI NPI 1407933492 David Eckert Social Worker · Saginaw, MI NPI 1295813160 Vickie Dillon Social Worker · Saginaw, MI NPI 1609954635 Carrie O'Toole Social Worker · Saginaw, MI NPI 1942388756 Ellen Ryder-Petre Social Worker · Saginaw, MI NPI 1548348584

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.