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James Douglas Warren, M.D.

Otolaryngology Physician in Boulder, CO · enumerated 2006.

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

National Provider Identifier

1194743450

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Registry record

Entity type Individual (Type 1)
Name James Douglas Warren
Credential M.D.
Sex Male
Practice address 4745 Arapahoe Ave, Ste 130, Boulder, CO, 80303
Phone (303) 443-2771
Fax (303) 443-2784
Enumeration date Jul 17, 2006
Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License 29977 (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
29977 Other CO STATE LICENSE
01299775 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.

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Frequently asked questions

What is the NPI number for James Warren?
The National Provider Identifier (NPI) for James Warren is 1194743450, a Type 1 (individual) record in the CMS NPPES registry.
Where does James Warren practice?
The practice location on file with NPPES is in Boulder, 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 2023-03-07.