Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Clark C Kulig, MD

Gastroenterology Physician in Denver, CO · enumerated 2006 · practices at Porter Adventist Health System.

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

National Provider Identifier

1669423430

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Registry record

Entity type Individual (Type 1)

Name Clark C Kulig

Credential MD

Sex Male

Practice address 2535 S Downing St Ste 380, Denver, CO, 80210

Phone (303) 778-5797

Fax (303) 778-5205

Enumeration date May 15, 2006

Last updated in NPPES Feb 5, 2025

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License DR.39951 (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
99350777	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

How do I verify Clark Kulig's NPI record?

Cross-check NPI 1669423430 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1669423430 active?

Yes, as of the latest NPPES snapshot, NPI 1669423430 is active (record last updated 2025-02-05).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-05.