Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory F Kellermeyer, M.D.

Psychiatry Physician in Westminster, CO · enumerated 2006.

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

National Provider Identifier

1043385396

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory F Kellermeyer

Credential M.D.

Sex Male

Practice address 7701 Sheridan Blvd, Westminster, CO, 80003

Phone (303) 338-4545

Enumeration date Nov 22, 2006

Last updated in NPPES Apr 2, 2021

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License A97506 (CA) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 41564 (CO) 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
97154024	Medicaid	CO	-
023459	Other	CO	KAISER COMMERCIAL NUMBER

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 Kellermeyer?

The National Provider Identifier (NPI) for Gregory Kellermeyer is 1043385396, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Kellermeyer practice?

The practice location on file with NPPES is in Westminster, CO. 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 2021-04-02.