NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Michael C. Zak, O.D., Pllc

Optometrist in Clarkston, MI · enumerated 2011 · authorized official Michael Zak, Owner.

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

National Provider Identifier

1447535539

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Michael C. Zak, O.D., Pllc
Practice address 6445 Citation Dr, Suite B, Clarkston, MI, 48346
Fax (248) 922-2894
Enumeration date Oct 20, 2011
Last updated in NPPES Oct 20, 2011

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers Primary

Authorized official

Name Michael Zak
Title Owner

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

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2011-10-20. Verify at npiregistry.cms.hhs.gov.
Where is Michael C. Zak, O.D., Pllc located?
The practice location on file with NPPES is in Clarkston, MI.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-20.