Kevin P. O'Brien, M.D.
Allergy & Immunology (Internal Medicine) Physician · Thornton, CO
Kevin P. O'Brien, M.D. is an allergy & immunology (internal medicine) physician with a practice address in Thornton, Colorado, and NPI 1134131733, issued on Aug 12, 2006. Check the license (Colorado 42142, as entered in NPPES) on the Colorado Medical Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Kevin P. O'Brien
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology (Internal Medicine) Physician 207RA0201X
- License number
- 42142 CO
Self-reported in NPPES; status is on the state search - Practice location
- 3260 E 104TH Ave, Thornton, CO 80233
- Phone
- (720) 929-8300
- Enumerated
- Aug 12, 2006
- Record last updated
- Jan 15, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (720) 929-8444
- Medicaid IDs
- 0873194 CO
62777076 CO - Entity
- Type 1 · individual
Also registered at 3260 E 104TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donna Ackerman, D.O.Pediatrics Physician1295728467
- Tori Cohen, PA-CPhysician Assistant1760063580
- William Cooper, MDFamily Medicine Physician1689611733
- James Doody, PA-CPhysician Assistant1366606956
- Whitney Harrington, PA-CPhysician Assistant1558670216
- Karen Markham, PA-CPhysician Assistant1154568756
Verify Kevin P. O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 42142Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Allergy & Immunology (Internal Medicine) Physician providers in Colorado
There are 12 allergy & immunology (internal medicine) physician records in Colorado. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other allergy & immunology (internal medicine) physician records in Colorado
- Allen Adinoff, MDAurora, CO1386614691
- Jason Catanzaro, M.D.Lone Tree, CO1780845768
- W Donald Cooke, MDDurango, CO1558437681
- Stephen Dreskin, MDAurora, CO1457441131
- Andrew Fontenot, MDAurora, CO1962592642
- Richard Luzietti, M.D.Aurora, CO1336293745
- Robert Nathan, MDColorado Springs, CO1487648077
- Robert Pace, MDLongmont, CO1861404220
- Snehal Patel, D.OLakewood, CO1275897001
- Paul Schkade, MDLakewood, CO1306865498
Common questions
What is Kevin P. O'Brien, M.D.'s NPI number?
Kevin P. O'Brien, M.D.'s National Provider Identifier (NPI) is 1134131733, issued on Aug 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kevin P. O'Brien, M.D. located?
The NPPES record lists a practice address at 3260 E 104TH Ave, Thornton, CO, 80233. Phone: (720) 929-8300. Providers update this record themselves, so call before visiting.
How can I verify Kevin P. O'Brien, M.D.'s license?
NPPES lists Colorado license number 42142, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.