NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. James L Napier Jr, MD

Neurology Physician in Green Bay, WI · enumerated 2006.

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

National Provider Identifier

1043327489

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. James L Napier Jr
Credential MD
Sex Male
Practice address 2845 Greenbrier Rd, #140, Green Bay, WI, 54308
Phone (920) 288-8100
Fax (920) 288-8152
Enumeration date Aug 23, 2006
Last updated in NPPES Oct 9, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 44857 (WI) Secondary
2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 44857 (WI) 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
34239300 Medicaid WI -

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 James Napier practice?
The practice location on file with NPPES is in Green Bay, WI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for James Napier?
The National Provider Identifier (NPI) for James Napier is 1043327489, 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 2023-10-09.