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Compare the published Medicare service mix of Robert David Pfeffer, M.D. with clinicians in the same registry specialty: Radiation Oncology (CMS).

MT · Exact areaEdit location

2024 published service data · 16 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Elizabeth M Tapen, MD

Radiation Oncology (CMS) · Big Sky, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Radiation treatment management, 5 treatment sessions (77427)
  • Ct guidance for insertion of radiation therapy fields (77014)
67%Service-mix similarityView profile →

Kelly Jane Underhill, M.D.

Radiation Oncology (CMS) · Great Falls, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
65%Service-mix similarityView profile →

Frank R Lamm, MD

Radiation Oncology (CMS) · Billings, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
65%Service-mix similarityView profile →

Trent Donald Mihalick, M.D.

Radiation Oncology (CMS) · Billings, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
64%Service-mix similarityView profile →

Joseph Wright Clyde, MD

Radiation Oncology (CMS) · Great Falls, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
64%Service-mix similarityView profile →

Christopher Barnett Baker, M.D.

Radiation Oncology (CMS) · Bozeman, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
63%Service-mix similarityView profile →

John M. Schallenkamp, MD

Hematology/Oncology · Radiation Oncology (CMS) · Billings, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
61%Service-mix similarityView profile →

Jeffrey A Stephenson, MD

Radiation Oncology (CMS) · Missoula, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
61%Service-mix similarityView profile →

Justin M. Linam, M.D.

Radiation Oncology (CMS) · Kalispell, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
61%Service-mix similarityView profile →

Jeffrey S. Eshleman, M.D.

Radiation Oncology (CMS) · Kalispell, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
61%Service-mix similarityView profile →

Carolyn Rutter, MD

Radiation Oncology (CMS) · Great Falls, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
61%Service-mix similarityView profile →

Michelle Ann Proper, M.D.

Radiation Oncology (CMS) · Missoula, MT

Shared published services
3 shared services · view billing descriptions
  • Design and construction of complex radiation treatment device (77334)
  • Complex radiation therapy planning (77263)
  • Radiation treatment management, 5 treatment sessions (77427)
59%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.