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

Mrs. Heather A Zak, PH.D, P.C.

Q: What is the NPI number for Heather Zak?

The National Provider Identifier (NPI) for Heather Zak is 1649361510, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Psychologist in East Lansing, MI · enumerated 2006.

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

National Provider Identifier

1649361510

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Registry record

Entity type Individual (Type 1)

Name Mrs. Heather A Zak

Credential PH.D, P.C.

Sex Female

Practice address East Lansing, MI, 48823

Phone (517) 327-7400

Fax (517) 913-6362

Enumeration date Sep 27, 2006

Last updated in NPPES Jun 16, 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 6301008893 (MI) Primary

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

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Heather Zak?

The National Provider Identifier (NPI) for Heather Zak is 1649361510, a Type 1 (individual) record in the CMS NPPES registry.

Where does Heather Zak practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-16.