NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

G Gregory Clark MD and Anne C Clark MD Apc

Specialist in Indianapolis, IN · enumerated 2006 · authorized official Anne Clark, Owner.

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

National Provider Identifier

1821167180

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name G Gregory Clark MD and Anne C Clark MD Apc
Practice address 9002 N Meridian St, Suite 112, Indianapolis, IN, 46260
Fax (317) 580-0443
Enumeration date Nov 8, 2006
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

174400000X Specialist Other Service Providers Primary

Authorized official

Name Anne Clark
Title Owner

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 G Gregory Clark MD and Anne C Clark MD Apc?
The NPI for G Gregory Clark MD and Anne C Clark MD Apc is 1821167180, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for G Gregory Clark MD and Anne C Clark MD Apc?
NPPES lists Anne Clark (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 2020-08-22.