NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Thomas Griesemer, D.C.

Chiropractor in Greenwood, IN · enumerated 2006 · practices at Griesemer Chiropractic, LLC.

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

National Provider Identifier

1871559690

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Mark Thomas Griesemer
Credential D.C.
Sex Male
Practice address 223 S State Road 135, Greenwood, IN, 46142
Fax (317) 882-1766
Enumeration date Apr 21, 2006
Last updated in NPPES Jul 25, 2011

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 08001713A (IN) Primary
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier Type State Issuer
7165004 Other IN AETNA PIN
000000207597 Other IN ANTHEM PIN
200223900 Medicaid IN -

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 Mark Griesemer?
The National Provider Identifier (NPI) for Mark Griesemer is 1871559690, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Griesemer practice?
The practice location on file with NPPES is in Greenwood, IN. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-07-25.