NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gregory D Popowitz PC

Optometrist in Okemos, MI · enumerated 2005 · authorized official Gregory Popowitz, Owner.

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

National Provider Identifier

1003804378

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Gregory D Popowitz PC
Other name <Unavail>
Practice address 2333 Jolly Rd, Okemos, MI, 48864
Fax (517) 381-2006
Enumeration date Oct 11, 2005
Last updated in NPPES May 14, 2008

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License 4901003607 (MI) Primary

Authorized official

Name Gregory Popowitz
Title Owner

Other identifiers

Identifier Type State Issuer
203456 Medicaid MI -
OC36852 Other MI BCBSM
200000002542 Medicaid MI -
200000002541 Medicaid MI -
253368 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Gregory D Popowitz PC?
The NPI for Gregory D Popowitz PC is 1003804378, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Gregory D Popowitz PC?
NPPES lists Gregory Popowitz (Owner) as the authorized official for this organization.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-14.