Benjamin D. Grass, M.D.
Family Medicine Physician · Ronan, MT
Benjamin D. Grass, M.D. is a family medicine physician with a practice address in Ronan, Montana, and NPI 1467894121, issued on Jul 23, 2013. Check the license (Montana 50100, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Benjamin D. Grass
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 50100 MT
Self-reported in NPPES; status is on the state search - Practice location
- 107 6TH Ave SW, Ronan, MT 59864
- Phone
- (406) 676-4441
- Enumerated
- Jul 23, 2013
- Record last updated
- Jun 15, 2023
- Fax
- (406) 676-0835
- Medicare enrollment
- Enrolled (PECOS I20150224000869); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 775 in Montana → Look up another NPI →
Also registered at 107 6TH Ave SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karen Adams, PTPhysical Therapist1891122529
- Kevin Adams, PTPhysical Therapist1063849701
- Phillip Anuta, DOEmergency Medicine Physician1396308789
- April CharloFamily Nurse Practitioner1053063008
- Tina Colton, P.T.Physical Therapist1750686929
- Ronald Dean, DOEmergency Medicine Physician1437198074
Verify Benjamin D. Grass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 50100Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average family medicine physician in 2024
183 Medicare Part D claims for 96 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Cefuroxime11 claims
- Prednisone11 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
- Providence Health And Services MtMissoula, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Benjamin D. Grass among 775 family medicine physician records in Montana
Benjamin D. Grass, M.D. is one of 775 family medicine physician records with a practice address in Montana. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 75% of them.
- NPI issued2013 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2013 · median 2007 among the 464 with a school on file
- Record last updated2023 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 family medicine physician records list a practice address in Ronan
They are 15 of the 112 NPPES records with a practice address in Ronan, and 775 family medicine physician records in Montana.
All 775 in Montana → Every provider in Ronan → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Emily AndersonRonan, MT 598641750744942
- Joanna Billings, D.O.Ronan, MT 598641447630868
- William Cullis, MDRonan, MT 598641174685374
- John Foster, M.D.Ronan, MT 598641588864979
- Sharla Hart, M.D.Ronan, MT 598641043326739
- Laura Hoganson, MDRonan, MT 598641295112944
- Jason JohnsonRonan, MT 598641073044343
- Hikmat Maaliki, MDRonan, MT 598641295897650
Common questions
What is Benjamin D. Grass, M.D.'s NPI number?
Benjamin D. Grass, M.D.'s National Provider Identifier (NPI) is 1467894121, issued on Jul 23, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Benjamin D. Grass, M.D. located?
The NPPES record lists a practice address at 107 6TH Ave SW, Ronan, MT, 59864. Phone: (406) 676-4441. Providers update this record themselves, so call before visiting.
How can I verify Benjamin D. Grass, M.D.'s license?
NPPES lists Montana license number 50100, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Benjamin D. Grass, M.D. prescribe under Medicare Part D?
In 2024, Benjamin D. Grass, M.D. had 183 Medicare Part D claims for 96 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.