Leslie Ballas, MD
Radiation Oncology (CMS) · Los Angeles, CA
Shared published services3 shared services · view billing descriptions
92%Service-mix similarityView profile →
Similar work.
More providers to explore.
Compare the published Medicare service mix of Thomas M. Guerrero, MD, PHD with clinicians in the same registry specialty: Radiation Oncology (CMS).
CA · Exact areaEdit location
2024 published service data · 449 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.
Jose Gilberto Bazan, MD
Radiation Oncology (CMS) · Duarte, CA
Shared published services3 shared services · view billing descriptions
91%Service-mix similarityView profile →
William W Chou, MD
Radiation Oncology (CMS) · Mission Viejo, CA
Shared published services3 shared services · view billing descriptions
91%Service-mix similarityView profile →
Sunanda M Pejavar, M.D.
Radiation Oncology (CMS) · La Mesa, CA
Shared published services3 shared services · view billing descriptions
91%Service-mix similarityView profile →
Andrew Zhang, MD
Radiation Oncology (CMS) · Laguna Hills, CA
Shared published services3 shared services · view billing descriptions
90%Service-mix similarityView profile →
Richard Jay Li, MD
Radiation Oncology (CMS) · Whittier, CA
Shared published services3 shared services · view billing descriptions
90%Service-mix similarityView profile →
Kamal Magan Patel, M.D.
Radiation Oncology (CMS) · Rancho Mirage, CA
Shared published services3 shared services · view billing descriptions
90%Service-mix similarityView profile →
Kevin Lin, M.D.
Radiation Oncology (CMS) · Newport Beach, CA
Shared published services3 shared services · view billing descriptions
90%Service-mix similarityView profile →
David Sup Hong, M.D.
Radiation Oncology (CMS) · Los Angeles, CA
Shared published services3 shared services · view billing descriptions
89%Service-mix similarityView profile →
Venita Lai Williams, MD
Radiation Oncology (CMS) · Orange, CA
Shared published services3 shared services · view billing descriptions
89%Service-mix similarityView profile →
Steven A Wahlen, M.D.
Radiation Oncology (CMS) · Chico, CA
Shared published services3 shared services · view billing descriptions
88%Service-mix similarityView profile →
Douglas A Kelly, MD
Radiation Oncology (CMS) · Eureka, CA
Shared published services3 shared services · view billing descriptions
88%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.