Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory B Carlson, MD

Family Medicine Physician in Denison, TX · enumerated 2006.

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

National Provider Identifier

1386694438

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Registry record

Entity type Individual (Type 1)

Name Gregory B Carlson

Credential MD

Sex Male

Practice address 5012 S Us Highway 75, Suite 300, Denison, TX, 75020

Phone (903) 416-6025

Fax (903) 416-6138

Enumeration date May 11, 2006

Last updated in NPPES Jan 26, 2018

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License K0666 (TX) 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
044508201	Medicaid	TX	-

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 Carlson?

The National Provider Identifier (NPI) for Gregory Carlson is 1386694438, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Carlson practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-01-26.