Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Robert David Pfeffer, MD

Individual provider Radiation Oncology Physician · NPI 1679563639

Robert David Pfeffer, MD is a Radiation Oncology in Sidney, Montana. Graduated from University of Washington School of Medicine in 1986, 40 years ago. Practices with Central Washington Health Services Association, a 702-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
40
Trained at
University of Washington School of Medicine
Licensed in
WA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

216 14th Ave SW
Sidney, MT 59270-3519
Phone: (406) 488-2100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence MD00026712 (WA)

Record details

NPI number1679563639
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 21, 2005
Last updated in NPPESApril 9, 2026
Certification dateApril 9, 2026
Mailing addressSidney Health Center, 14th Ave Sw, Sidney, MT 59270

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRADIATION ONCOLOGY
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice Central Washington Health Services Association — 702 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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