Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Kevin P O'Brien, M.D.

Allergy & Immunology (Internal Medicine) Physician in Thornton, CO · enumerated 2006.

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

National Provider Identifier

1134131733

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Registry record

Entity type Individual (Type 1)

Name Dr. Kevin P O'Brien

Credential M.D.

Sex Male

Practice address 3260 E 104th Ave, Thornton, CO, 80233

Phone (720) 929-8300

Fax (720) 929-8444

Enumeration date Aug 12, 2006

Last updated in NPPES Jan 15, 2010

Taxonomy & licenses

207RA0201X Allergy & Immunology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 42142 (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
0873194	Medicaid	CO	-
62777076	Medicaid	CO	-
26003329908	Other	CO	PACIFICARE
1057406	Other	CO	UNITED HEALTHCARE
OBO68158	Other	CO	BLUE CROSS BLUE SHIELD

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

Is NPI 1134131733 active?

Yes, as of the latest NPPES snapshot, NPI 1134131733 is active (record last updated 2010-01-15).

How do I verify Kevin O'Brien's NPI record?

Cross-check NPI 1134131733 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-15.