Claire Alexandra Mastel, PA-C
Physician Assistant · Billings, MT
Claire Alexandra Mastel, PA-C is a physician assistant with a practice address in Billings, Montana, and NPI 1871178202, issued on Mar 17, 2021. Check the license (Montana MED-PAC-LIC-90826, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Claire Alexandra Mastel
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- MED-PAC-LIC-90826 MT
Self-reported in NPPES; status is on the state search - Practice location
- 820 Division St, Billings, MT 59101
- Phone
- (406) 294-5225
- Enumerated
- Mar 17, 2021
- Record last updated
- Jul 11, 2023
- Fax
- (406) 294-5226
- Medicare enrollment
- Enrolled (PECOS I20240202003838); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 820 Division St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Naomi RoutenPhysician Assistant1902293822
- Troy Stiles, D.O.Psychiatry Physician1437122207
Verify Claire Alexandra Mastel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license MED-PAC-LIC-90826Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average physician assistant in 2024
600 Medicare Part D claims for 54 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Venlafaxine Hcl Er46 claims
- Aripiprazole44 claims
- Trazodone Hcl44 claims
- Bupropion Xl42 claims
- Duloxetine Hcl41 claims
- Propranolol Hcl30 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
- Frontier Psychiatry PLLCSandpoint, ID
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
170 physician assistant records list a practice address in Billings
They are 170 of the 4,035 NPPES records with a practice address in Billings, and 698 physician assistant records in Montana.
All 170 in Billings → All 698 in Montana → Every provider in Billings →
Other physician assistant records in Montana
- Jessika Abbrescia, PACKalispell, MT1740959915
- Cynthia Alarcon, PA-CHelena, MT1386981686
- Patrick Alduenda, PA-CHelena, MT1710967724
- Sheryl Alexander, D.C., P.A.Missoula, MT1326199951
- Jesse Alfiero, PA-CRonan, MT1396491155
- Robert Alfiero, PA-CRonan, MT1417029059
- Janel Allison-Shamblin, PA-CBozeman, MT1437626751
- Luke Altenhofen, PA-CLame Deer, MT1407221708
- Alexandra AlthofBillings, MT1487338034
- Brenda Anderson, PA-CKalispell, MT1912145467
Common questions
What is Claire Alexandra Mastel, PA-C's NPI number?
Claire Alexandra Mastel, PA-C's National Provider Identifier (NPI) is 1871178202, issued on Mar 17, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Claire Alexandra Mastel, PA-C located?
The NPPES record lists a practice address at 820 Division St, Billings, MT, 59101. Phone: (406) 294-5225. Providers update this record themselves, so call before visiting.
How can I verify Claire Alexandra Mastel, PA-C's license?
NPPES lists Montana license number MED-PAC-LIC-90826, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
How much does Claire Alexandra Mastel, PA-C prescribe under Medicare Part D?
In 2024, Claire Alexandra Mastel, PA-C had 600 Medicare Part D claims for 54 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.