Maria Lyn Rennaker, PA
Physician Assistant · Darby, MT
Maria Lyn Rennaker, PA is a physician assistant with a practice address in Darby, Montana, and NPI 1215521331, issued on Mar 1, 2021. Check the license (Montana 91830, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maria Lyn Rennaker
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 91830 MT
Self-reported in NPPES; status is on the state search - Practice location
- 3334 Dvn LN, Darby, MT 59829
- Phone
- (406) 375-4142
- Enumerated
- Mar 1, 2021
- Record last updated
- Jul 3, 2023
- Fax
- (406) 375-4143
- Medicare enrollment
- Enrolled (PECOS I20210722003369); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 698 in Montana → Look up another NPI →
Verify Maria Lyn Rennaker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license 91830Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.4 times the Medicare Part D claims of the average physician assistant in 2024
6,166 Medicare Part D claims for 385 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 422 claims were for opioids.
Most prescribed
- Atorvastatin Calcium288 claims
- Levothyroxine Sodium274 claims
- Losartan Potassium252 claims
- Hydrocodone-Acetaminophen223 claims
- Omeprazole215 claims
- Amlodipine Besylate173 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 2 group practices
- Marcus Daly Memorial Hospital CorporationDarby, MT
- Sapphire Community Health IncHamilton, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria Lyn Rennaker among 698 physician assistant records in Montana
Maria Lyn Rennaker, PA 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 2021, is newer than 75% of them.
- NPI issued2021 · 75% of these records are older, 20% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2020 · median 2016 among the 514 with a school on file
- Record last updated2023 · 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).
1 physician assistant record lists a practice address in Darby
They are 1 of the 12 NPPES records with a practice address in Darby, and 698 physician assistant records in Montana.
All 698 in Montana → Every provider in Darby → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Terrence AustinFlorence, MT 598331265825434
- Matthew LittletonFlorence, MT 598331801521661
- Taylor Anderson, PA-CHamilton, MT 598401639958275
- Barbara Burke, PA-CHamilton, MT 598401386746600
- Edward Cleary, PA-CHamilton, MT 598401790566321
- Hugh Gapay, PA-CHamilton, MT 598401396968202
- Patrick Grimm, PA-CHamilton, MT 598401154318574
- Jean Higgins Peretto, PAHamilton, MT 598401821196387
Common questions
What is Maria Lyn Rennaker, PA's NPI number?
Maria Lyn Rennaker, PA's National Provider Identifier (NPI) is 1215521331, issued on Mar 1, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Maria Lyn Rennaker, PA located?
The NPPES record lists a practice address at 3334 Dvn LN, Darby, MT, 59829. Phone: (406) 375-4142. Providers update this record themselves, so call before visiting.
How can I verify Maria Lyn Rennaker, PA's license?
NPPES lists Montana license number 91830, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
How much does Maria Lyn Rennaker, PA prescribe under Medicare Part D?
In 2024, Maria Lyn Rennaker, PA had 6,166 Medicare Part D claims for 385 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.