NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gregory D Anderson

Chiropractor in Lake Mills, WI · enumerated 2007 · authorized official Gregory Anderson, Sole Proprietor.

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

National Provider Identifier

1538203666

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Gregory D Anderson
Other name <Unavail>
Practice address 120 E Oak St, Lake Mills, WI, 53551
Enumeration date Feb 20, 2007
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

111N00000X Chiropractor Chiropractic Providers · License 1410 (WI) Primary

Authorized official

Name Gregory Anderson
Title Sole Proprietor

Other identifiers

Identifier Type State Issuer
38752200 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

What is the NPI number for Gregory D Anderson?
The NPI for Gregory D Anderson is 1538203666, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Gregory D Anderson?
NPPES lists Gregory Anderson (Sole Proprietor) 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 2020-08-22.