Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory H. Carlsen, MD

Radiation Oncology Physician in Danville, KY · enumerated 2005.

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

National Provider Identifier

1306831516

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Registry record

Entity type Individual (Type 1)

Name Gregory H. Carlsen

Credential MD

Sex Male

Practice address 204 S 2nd St, Danville, KY, 40422

Phone (859) 236-9819

Fax (859) 236-2192

Enumeration date Sep 14, 2005

Last updated in NPPES Nov 23, 2016

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 32606 (KY) 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
1135712	Other	KY	PASSPORT HEALTH PROV. #
1135712	Other	KY	PASSPORT MED ADV #
000000306671	Other	KY	ANTHEM BCBS PROV. #
50001834	Other	KY	PASSPORT HEALTH GRP #
1206474	Other	FL	GATEWAY HEALTH
1859601	Medicaid	KY	-
000000476307	Other	KY	ANTHEM BCBS PROV. #
P00113978	Other	KY	RAILROAD MCARE #
564019	Other	KY	STERLING HEALTH

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 Carlsen?

The National Provider Identifier (NPI) for Gregory Carlsen is 1306831516, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Carlsen practice?

The practice location on file with NPPES is in Danville, KY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-11-23.