Robert David Pfeffer, M.D.
Radiation Oncology Physician · Sidney, MT
Robert David Pfeffer, M.D. is a radiation oncology physician with a practice address in Sidney, Montana, and NPI 1679563639, issued on Oct 21, 2005. Check the license on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Robert David Pfeffer
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- MD00026712 WA
Self-reported in NPPES; status is on the state search - Practice location
- 216 14TH Ave SW, Sidney, MT 59270
- Phone
- (406) 488-2100
- Enumerated
- Oct 21, 2005
- Record last updated
- Apr 9, 2026
- Medicaid IDs
- 807071800 ID
8417248 WA - Medicare enrollment
- Enrolled (PECOS I20050203000722); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 24 in Montana → Look up another NPI →
Also registered at 216 14TH Ave SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Luke Abar, CRNACertified Registered Nurse Anesthetist1992173389
- Jennifer Adams, MDDiagnostic Radiology Physician1770540254
- Karen Arnold Truax, LCSWClinical Social Worker1710377684
- Lynn Beyerle, PHARM.D.Pharmacist1295721934
- Amanda Brown, LCSWClinical Psychologist1235858846
- David Brown, CRNACertified Registered Nurse Anesthetist1346272184
Verify Robert David Pfeffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical ExaminersCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average radiation oncology physician in 2024
18 Medicare Part D claims, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
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
- Central Washington Health Services AssociationMoses Lake, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert David Pfeffer among 24 radiation oncology physician records in Montana
Robert David Pfeffer, M.D. is one of 24 radiation oncology physician records with a practice address in Montana. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 79% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated1986 · median 1997 among the 19 with a school on file
- Record last updated2026 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 radiation oncology physician records list a practice address in Sidney
They are 2 of the 119 NPPES records with a practice address in Sidney, and 24 radiation oncology physician records in Montana.
All 24 in Montana → Every provider in Sidney → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Ralf Kiehl, MDSidney, MT 592701760483788
- Joseph Clyde, MDGreat Falls, MT 594051710478698
- Berna Demalignon, M.D.Great Falls, MT 594051770560948
- Carolyn Rutter, MDGreat Falls, MT 594051912016767
- Kelly Underhill, M.D.Great Falls, MT 594051447275870
- Frank Lamm, MDBillings, MT 591021417949033
- Trent Mihalick, M.D.Billings, MT 591021942306063
- Rebecca Tarlton, MDBillings, MT 591021083655393
Common questions
What is Robert David Pfeffer, M.D.'s NPI number?
Robert David Pfeffer, M.D.'s National Provider Identifier (NPI) is 1679563639, issued on Oct 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert David Pfeffer, M.D. located?
The NPPES record lists a practice address at 216 14TH Ave SW, Sidney, MT, 59270. Phone: (406) 488-2100. Providers update this record themselves, so call before visiting.
How can I verify Robert David Pfeffer, M.D.'s license?
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 Robert David Pfeffer, M.D. prescribe under Medicare Part D?
In 2024, Robert David Pfeffer, M.D. had 18 Medicare Part D claims; the average among radiation oncology physician prescribers was 134. 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.