Oivind Frederick Westereng, PA-C
Physician Assistant · Missoula, MT
Oivind Frederick Westereng, PA-C is a physician assistant with a practice address in Missoula, Montana, and NPI 1295044394, issued on Oct 7, 2010. Check the license (Montana 628, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Oivind Frederick Westereng
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 628 MT
Self-reported in NPPES; status is on the state search - Practice location
- 3624 Brooks St Ste 101, Missoula, MT 59801
- Phone
- (888) 227-3312
- Enumerated
- Oct 7, 2010
- Record last updated
- Apr 22, 2024
- Medicare enrollment
- Enrolled (PECOS I20240610003605); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 698 in Montana → Look up another NPI →
Also registered at 3624 Brooks St Ste 101
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth France, PA-CPhysician Assistant1578508321
- Jennifer Larson, ARNPNurse Practitioner1184675233
- Hayley MeyerPhysician Assistant1336682236
- Kelly Williams, ARNPFamily Nurse Practitioner1225283153
Verify Oivind Frederick Westereng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license 628Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average physician assistant in 2024
208 Medicare Part D claims for 165 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Paxlovid25 claims
- Amoxicillin-Clavulanate Potass20 claims
- Prednisone20 claims
- Doxycycline Hyclate16 claims
- Cephalexin15 claims
- Albuterol Sulfate Hfa12 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 85.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Express Care OR PCHillsboro, OR
- Express Care WA PCSpokane, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Oivind Frederick Westereng among 698 physician assistant records in Montana
Oivind Frederick Westereng, 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 2010, is newer than 34% of them.
- NPI issued2010 · 34% of these records are older, 64% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2010 · median 2016 among the 514 with a school on file
- 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).
119 physician assistant records list a practice address in Missoula
They are 119 of the 3,567 NPPES records with a practice address in Missoula, and 698 physician assistant records in Montana.
All 698 in Montana → Every provider in Missoula → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Sophia Asa, PAMissoula, MT 598011972487072
- Patricia Brewer, P.A.-CMissoula, MT 598011003901216
- Marissa Cadena, PA-CMissoula, MT 598011669013744
- Victoria Callahan, PA-CMissoula, MT 598011568937126
- Elizabeth France, PA-CMissoula, MT 598011578508321
- Carley LukasiewiczMissoula, MT 598011255220661
- Hayley MeyerMissoula, MT 598011336682236
- Samuel Millett, PA-SMissoula, MT 598011144748831
Common questions
What is Oivind Frederick Westereng, PA-C's NPI number?
Oivind Frederick Westereng, PA-C's National Provider Identifier (NPI) is 1295044394, issued on Oct 7, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Oivind Frederick Westereng, PA-C located?
The NPPES record lists a practice address at 3624 Brooks St Ste 101, Missoula, MT, 59801. Phone: (888) 227-3312. Providers update this record themselves, so call before visiting.
How can I verify Oivind Frederick Westereng, PA-C's license?
NPPES lists Montana license number 628, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
How much does Oivind Frederick Westereng, PA-C prescribe under Medicare Part D?
In 2024, Oivind Frederick Westereng, PA-C had 208 Medicare Part D claims for 165 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Oivind Frederick Westereng, PA-C's MIPS final score?
The 2023 MIPS final score is 85.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.