NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Paul James Grenier, O.D.

Optometrist in Ann Arbor, MI · enumerated 2006.

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

National Provider Identifier

1386608081

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Paul James Grenier
Credential O.D.
Sex Male
Practice address 1000 Wall St, Ann Arbor, MI, 48105
Phone (734) 764-4190
Enumeration date Apr 12, 2006
Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 046-009510 (IL) Secondary
152W00000X Optometrist Eye and Vision Services Providers · License 4901004452 (MI) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD 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

Where does Paul Grenier practice?
The practice location on file with NPPES is in Ann Arbor, MI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Paul Grenier?
The National Provider Identifier (NPI) for Paul Grenier is 1386608081, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.