NPPES file of Aug 9, 2026

James Barry Oser, M.D.

Family Medicine Physician · Deer Lodge, MT

James Barry Oser, M.D. is a family medicine physician with a practice address in Deer Lodge, Montana, and NPI 1629121082, issued on Jan 19, 2007. Check the license (Montana 8286, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1629121082
Name
James Barry Oser
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
8286 MT
Self-reported in NPPES; status is on the state search
Practice location
1101 Texas Ave, Deer Lodge, MT 59722
Phone
(406) 846-1722
Enumerated
Jan 19, 2007
Record last updated
Sep 21, 2009 (not updated in 17 years: call before relying on the address or phone)
Fax
(406) 846-3074
Medicare enrollment
Enrolled (PECOS I20081201000007); accepts Medicare assignment
Medical or professional school
University Of Toledo College Of Medicine, 1989
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 1101 Texas Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Barb Bailey, PA-CPhysician Assistant1396898755
  2. Leonard Bauer, M.D.Family Medicine Physician1508880527
  3. Thomas Rachie, D.C.Chiropractor1942515762

Verify James Barry Oser in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMontana Board of Medical Examiners
    Search for license 8286    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Montana license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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95% fewer Medicare Part D claims than the average family medicine physician in 2024

193 Medicare Part D claims for 138 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 21 claims were for opioids.

  1. James Oser193
  2. Specialty average3,544

Most prescribed

  1. Prednisone24 claims
  2. Ondansetron Odt15 claims
  3. Cefuroxime13 claims
  4. Hydrocodone-Acetaminophen11 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

  1. Scl Health Medical Group-Butte LLCButte, MT

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

9 family medicine physician records list a practice address in Deer Lodge

They are 9 of the 53 NPPES records with a practice address in Deer Lodge, and 775 family medicine physician records in Montana.

All 9 in Deer Lodge → All 775 in Montana → Every provider in Deer Lodge →

Other family medicine physician records in Montana

  1. Marc Adams, MDShelby, MT1265449482
  2. Dale Agner, M.D.Billings, MT1861486490
  3. Marjorie AlbersMiles City, MT1174029086
  4. Brandon Allen, MDEnnis, MT1215499421
  5. Hans Amen, D.O.Malmstrom Afb, MT1538426507
  6. Beth Ammons, MDMissoula, MT1780623926
  7. Bjorn Anderson, DOStevensville, MT1770146037
  8. Emily AndersonRonan, MT1750744942
  9. Jonathan Anderson, MDKalispell, MT1356397533
  10. Leah Anderson, M.D.Bozeman, MT1851504195

Common questions

What is James Barry Oser, M.D.'s NPI number?

James Barry Oser, M.D.'s National Provider Identifier (NPI) is 1629121082, issued on Jan 19, 2007. An NPI identifies a provider in billing; it is not a license.

Where is James Barry Oser, M.D. located?

The NPPES record lists a practice address at 1101 Texas Ave, Deer Lodge, MT, 59722. Phone: (406) 846-1722. Providers update this record themselves, so call before visiting.

How can I verify James Barry Oser, M.D.'s license?

NPPES lists Montana license number 8286, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does James Barry Oser, M.D. prescribe under Medicare Part D?

In 2024, James Barry Oser, M.D. had 193 Medicare Part D claims for 138 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.