Timothy D. Ungerer, D.O.
Anesthesiology · San Ramon, CA
Shared published services2 shared services · view billing descriptions
50%Service-mix similarityView profile →
Similar work.
More providers to explore.
Compare the published Medicare service mix of Andrew Robert Rivera, MD with clinicians in the same registry specialty: Anesthesiology.
SAN RAMON, CA · Exact areaEdit location
2024 published service data · 7 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.
Mark Fujii, MD
Anesthesiology · San Ramon, CA
Shared published services3 shared services · view billing descriptions
49%Service-mix similarityView profile →
Allison K Duffy, M.D.
Anesthesiology · San Ramon, CA
Shared published services1 shared services · view billing descriptions
20%Service-mix similarityView profile →
Mir E Ali, M.D.
Anesthesiology · San Ramon, CA
Shared published services1 shared services · view billing descriptions
13%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.