James Haldeman Armstrong, MD
Family Medicine Physician · Missoula, MT
James Haldeman Armstrong, MD is a family medicine physician with a practice address in Missoula, Montana, and NPI 1881649952, issued on May 24, 2006. Check the license (Montana 8270, as entered in NPPES) on the Montana Board of Medical Examiners; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- James Haldeman Armstrong
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 8270 MT
Self-reported in NPPES; status is on the state search - Practice location
- 2819 Great Northern Loop, Missoula, MT 59808
- Phone
- (406) 541-3046
- Enumerated
- May 24, 2006
- Record last updated
- Feb 1, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (406) 543-0740
- Medicaid ID
- 98039 MT
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 775 in Montana → Look up another NPI →
Also registered at 2819 Great Northern Loop
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James Haldeman Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 8270Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
James Haldeman Armstrong among 775 family medicine physician records in Montana
James Haldeman Armstrong, MD is one of 775 family medicine physician records with a practice address in Montana. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 50% newer
- In a Medicare fileNo · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2016 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
110 family medicine physician records list a practice address in Missoula
They are 110 of the 3,567 NPPES records with a practice address in Missoula, and 775 family medicine physician records in Montana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 775 in Montana → Every provider in Missoula → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kimberly Blakeslee, D.O.Missoula, MT 598081659327609
- Carla Davis, MDMissoula, MT 598081568472785
- Geoffrey Holman, MDMissoula, MT 598081609372093
- Mallory Koula, MDMissoula, MT 598081467987727
- Brianna Mew, D.O.Missoula, MT 598081972982288
- James Quirk, MDMissoula, MT 598081922106004
- Melanie Scott, DOMissoula, MT 598081710515192
- Susan Selbach, MDMissoula, MT 598081427160605
Common questions
What is James Haldeman Armstrong, MD's NPI number?
James Haldeman Armstrong, MD's National Provider Identifier (NPI) is 1881649952, issued on May 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Haldeman Armstrong, MD located?
The NPPES record lists a practice address at 2819 Great Northern Loop, Missoula, MT, 59808. Phone: (406) 541-3046. Providers update this record themselves, so call before visiting.
How can I verify James Haldeman Armstrong, MD's license?
NPPES lists Montana license number 8270, 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.
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.