NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory N Appenfeller, MD

Anesthesiology Physician in Olathe, KS · enumerated 2006.

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

National Provider Identifier

1578663720

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Gregory N Appenfeller
Credential MD
Sex Male
Practice address 20375 W 151st St, Suite 306, Olathe, KS, 66061
Phone (913) 782-2292
Fax (913) 782-2381
Enumeration date Sep 25, 2006
Last updated in NPPES Nov 1, 2013

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 0424023 (KS) 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
100124970C Medicaid KS -

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 Appenfeller?
The National Provider Identifier (NPI) for Gregory Appenfeller is 1578663720, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gregory Appenfeller practice?
The practice location on file with NPPES is in Olathe, KS. 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 2013-11-01.