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

Mark Gregory Iszak, PSYD

Q: What is the NPI number for Mark Iszak?

The National Provider Identifier (NPI) for Mark Iszak is 1548542186, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Psychologist in Bingham Farms, MI · enumerated 2011 · practices at Acceptance Counseling and Therapy Pllc.

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

National Provider Identifier

1548542186

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Registry record

Entity type Individual (Type 1)

Name Mark Gregory Iszak

Credential PSYD

Sex Male

Practice address Bingham Farms, MI, 48025

Phone (800) 693-1916

Fax (248) 605-3525

Enumeration date Sep 9, 2011

Last updated in NPPES Sep 20, 2018

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 071008523 (IL) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 6301014853 (MI) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD 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.

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Frequently asked questions

What is the NPI number for Mark Iszak?

The National Provider Identifier (NPI) for Mark Iszak is 1548542186, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Iszak practice?

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

Other providers at this practice address

Browse all →

Daniel Stettner Lp Clinical Psychologist · Bingham Farms, MI NPI 1093821597 Michelle Thomas - Cheatham Psychologist · Bingham Farms, MI NPI 1992919112 Sherry Brown Social Worker · Bingham Farms, MI NPI 1831375658 Jacquelyn Flemmer Clinical Social Worker · Bingham Farms, MI NPI 1881026805 Emily Lemke Social Worker · Bingham Farms, MI NPI 1780093377 Tyrell Boydston Social Worker · Bingham Farms, MI NPI 1417306861 Lisa Gold Social Worker · Bingham Farms, MI NPI 1710410220 Kelsey Russom Psychologist · Bingham Farms, MI NPI 1124538848

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-20.