James K. Obrien, M.D.
Pulmonary Disease Physician · Denver, CO
James K. Obrien, M.D. is a pulmonary disease physician with a practice address in Denver, Colorado, and NPI 1144244161, issued on Jul 26, 2006. Check the license on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- James K. Obrien
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- 0101252867 VA
Self-reported in NPPES; status is on the state search - Practice location
- 1400 Jackson St, Denver, CO 80206
- Phone
- (303) 388-4461
- Enumerated
- Jul 26, 2006
- Record last updated
- Mar 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (303) 270-2206
- Medicaid ID
- 01210590 CO
- Medicare enrollment
- Enrolled (PECOS I20101229000312); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1987
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 288 in Colorado → Look up another NPI →
Also registered at 1400 Jackson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ronya Ajeel, APN-CRNACertified Registered Nurse Anesthetist1184279044
- Akrum Al-Zubaidi, D.O.Pulmonary Disease Physician1649426222
- Rafeul Alam, MDAllergy & Immunology Physician1790730687
- Jon Allison, PACMedical Physician Assistant1609812668
- Vivianne Allsop, MDRheumatology Physician1215499603
- Mark Aloia, MDPsychiatry Physician1295842607
Verify James K. Obrien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
123 Medicare Part D claims for 48 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 59% of claims.
Most prescribed
- Breo Ellipta21 claims
- Famotidine17 claims
- Anoro Ellipta12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Banner Health Physicians Colorado LLCGreeley, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James K. Obrien among 288 pulmonary disease physician records in Colorado
James K. Obrien, M.D. is one of 288 pulmonary disease physician records with a practice address in Colorado. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1987 · median 2003 among the 210 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Colorado
There are 288 pulmonary disease physician records in Colorado.
All 288 in Colorado → Every provider in Denver → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Evans Fernandezperez, M.D.Denver, CO 802061700858065
- James Jett, M.D.Denver, CO 802061174509186
- Jeffrey Kern, MDDenver, CO 802061457371114
- Robert Lapidus, M.D.Denver, CO 802061760485023
- Steven Lommatzsch, M.D.Denver, CO 802061750309571
- Vipin Malik, MDDenver, CO 802061669413860
- Amy Olson, MDDenver, CO 802061265409056
- Irina Petrache, MDDenver, CO 802061801851365
Common questions
What is James K. Obrien, M.D.'s NPI number?
James K. Obrien, M.D.'s National Provider Identifier (NPI) is 1144244161, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James K. Obrien, M.D. located?
The NPPES record lists a practice address at 1400 Jackson St, Denver, CO, 80206. Phone: (303) 388-4461. Providers update this record themselves, so call before visiting.
How can I verify James K. Obrien, M.D.'s license?
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.
How much does James K. Obrien, M.D. prescribe under Medicare Part D?
In 2024, James K. Obrien, M.D. had 123 Medicare Part D claims for 48 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.