NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John M Barnett, MD

Hematology & Oncology Physician in Longmont, CO · enumerated 2006.

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

National Provider Identifier

1952341273

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name John M Barnett
Credential MD
Sex Male
Practice address 1760 E Ken Pratt Blvd Ste 302, Longmont, CO, 80504
Phone (303) 684-1900
Fax (303) 684-1925
Enumeration date Jun 7, 2006
Last updated in NPPES Jul 6, 2023

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 44274 (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
65187741 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 John Barnett practice?
The practice location on file with NPPES is in Longmont, CO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Barnett?
The National Provider Identifier (NPI) for John Barnett is 1952341273, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-07-06.