NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Peter G. Grain, M.D.

Neurological Surgery Physician in Port Huron, MI · enumerated 2006.

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

National Provider Identifier

1780664573

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Peter G. Grain
Credential M.D.
Sex Male
Practice address 2603 Electric Ave, Suite A, Port Huron, MI, 48060
Phone (810) 987-1056
Fax (810) 987-1060
Enumeration date Jan 19, 2006
Last updated in NPPES Jan 5, 2010

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License 4301069603 (MI) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
103409558 Medicaid MI -
0580808 Other MI AETNA HEALTH PLANS
15231 Other MI M-CARE
D16645 Other MI HEALTH ALLIANCE PLAN
1406326922 Other MI BLUE CROSS BLUE SHIELD
P00171032 Other MI RAILROAD MEDICARE
104604735 Medicaid MI -
0999859 Other MI HEALTH PLUS OF MICHIGAN

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 Peter Grain practice?
The practice location on file with NPPES is in Port Huron, MI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Peter Grain?
The National Provider Identifier (NPI) for Peter Grain is 1780664573, 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 2010-01-05.