Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Raphael Kotnis, MD

Anatomic Pathology & Clinical Pathology Physician in Denver, CO · enumerated 2007.

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

National Provider Identifier

1740336429

Verified

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Registry record

Entity type Individual (Type 1)

Name Gregory Raphael Kotnis

Credential MD

Sex Male

Practice address 6116 E Warren Ave, Denver, CO, 80222

Phone (303) 512-2299

Enumeration date Jan 26, 2007

Last updated in NPPES Sep 24, 2015

Taxonomy & licenses

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 0101252050 (VA) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License DR.0050096 (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
PENDING	Medicaid	VA	-
99158752	Medicaid	CO	-

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

Where does Gregory Kotnis practice?

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

What is the NPI number for Gregory Kotnis?

The National Provider Identifier (NPI) for Gregory Kotnis is 1740336429, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-24.