Marin Underhill
Physician Assistant · Billings, MT
Marin Underhill is a physician assistant with a practice address in Billings, Montana, and NPI 1114897527, issued on Nov 10, 2025. Check the license with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marin Underhill
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 801 N 29TH St, Billings, MT 59101
- Phone
- (406) 238-2500
- Enumerated
- Nov 10, 2025
- Record last updated
- Nov 10, 2025
- Medicare enrollment
- Enrolled (PECOS I20260114000388); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 698 in Montana → Look up another NPI →
Also registered at 801 N 29TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Annalee Anderson, MA, CCC-SLPSpeech-Language Pathologist1083047088
- Bijan Andrade, DPMFoot & Ankle Surgery Podiatrist1891059556
Verify Marin Underhill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
One hospital affiliation
- Billings ClinicBillings, MT · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Marin Underhill among 698 physician assistant records in Montana
Marin Underhill 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 2025, is newer than 94% of them.
- NPI issued2025 · 94% of these records are older, 2% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2025 · median 2016 among the 514 with a school on file
- Record last updated2025 · 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).
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 698 in Montana → Every provider in Billings → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Susan Cerovski, PABillings, MT 591011891771622
- Linda Dupree, PACBillings, MT 591011073516167
- John Etchart, PA-CBillings, MT 591011124010830
- Kathryn Hall, PA-CBillings, MT 591011366438285
- Myrna Mentikov, PA-CBillings, MT 591011750377735
- Lisa Murray, PA-CBillings, MT 591011821084369
- Deanna Niles, PA-CBillings, MT 591011881666261
- Mark Pierson, PA-CBillings, MT 591011508858234
Common questions
What is Marin Underhill's NPI number?
Marin Underhill's National Provider Identifier (NPI) is 1114897527, issued on Nov 10, 2025. An NPI identifies a provider in billing; it is not a license.
Where is Marin Underhill located?
The NPPES record lists a practice address at 801 N 29TH St, Billings, MT, 59101. Phone: (406) 238-2500. Providers update this record themselves, so call before visiting.
How can I verify Marin Underhill's license?
Search the Montana board that licenses this profession; the NPPES record confirms identity 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.