Patrick T. Armstrong, PA-C
Physician Assistant · Chester, MT
Patrick T. Armstrong, PA-C is a physician assistant with a practice address in Chester, Montana, and NPI 1063468015, issued on May 25, 2006. Check the license (Montana 129, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Patrick T. Armstrong
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 129 MT
Self-reported in NPPES; status is on the state search - Practice location
- 418 West Monroe, Chester, MT 59522
- Phone
- (406) 759-5181
- Enumerated
- May 25, 2006
- Record last updated
- Feb 19, 2024
- Fax
- (406) 759-5105
- Medicaid ID
- 0066417 MT
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 698 in Montana → Look up another NPI →
Also registered at 418 West Monroe
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeffery Chelmo, PAPhysician Assistant1336238518
Verify Patrick T. Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license 129Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.5 times the Medicare Part D claims of the average physician assistant in 2024
3,750 Medicare Part D claims for 179 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 28 claims were for opioids.
Most prescribed
- Levothyroxine Sodium175 claims
- Losartan Potassium174 claims
- Rosuvastatin Calcium154 claims
- Atorvastatin Calcium144 claims
- Amlodipine Besylate132 claims
- Metoprolol Succinate127 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.
Patrick T. Armstrong among 698 physician assistant records in Montana
Patrick T. Armstrong, PA-C is one of 698 physician assistant records with a practice address in Montana. 84% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 77% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 74% of these records are
- Record last updated2024 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 physician assistant records list a practice address in Chester
They are 4 of the 15 NPPES records with a practice address in Chester, and 698 physician assistant records in Montana.
All 698 in Montana → Every provider in Chester → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Jeffery Chelmo, PAChester, MT 595221336238518
- Katelyn GraffChester, MT 595221528686631
- Jill Leblanc, PAChester, MT 595221821300849
- Megan Faber, PAChinook, MT 595231790419224
- Krystyl Kulbeck, PA-CBig Sandy, MT 595201790041309
- Trevor Quandt, PA-CHarlem, MT 595261346852068
- Randy Holland, PA-CHavre, MT 595011053422154
- Mark Jamieson, PAHavre, MT 595011609816867
Common questions
What is Patrick T. Armstrong, PA-C's NPI number?
Patrick T. Armstrong, PA-C's National Provider Identifier (NPI) is 1063468015, issued on May 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Patrick T. Armstrong, PA-C located?
The NPPES record lists a practice address at 418 West Monroe, Chester, MT, 59522. Phone: (406) 759-5181. Providers update this record themselves, so call before visiting.
How can I verify Patrick T. Armstrong, PA-C's license?
NPPES lists Montana license number 129, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
How much does Patrick T. Armstrong, PA-C prescribe under Medicare Part D?
In 2024, Patrick T. Armstrong, PA-C had 3,750 Medicare Part D claims for 179 beneficiaries; the average among physician assistant prescribers was 830. 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.