Jane Alison Semel, M.D.
Ophthalmology (CMS) · El Segundo, CA
Shared published services3 shared services · view billing descriptions
69%Service-mix similarity~23.0 milesView profile →
Similar work.
More providers to explore.
Compare the published Medicare service mix of Douglas Reid Gellerman, MD with clinicians in the same registry specialty: Ophthalmology (CMS).
WEST HILLS, CA · 25 milesEdit location
Within 25 miles · Approximate ZIP-area distance
Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works
2024 published service data · 220 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.
John Joseph Darin, M.D.
Ophthalmology (CMS) · Westlake Village, CA
Shared published services3 shared services · view billing descriptions
59%Service-mix similarity~11.8 milesView profile →
John Kelly Schofield, D.O.
Ophthalmology (CMS) · Santa Monica, CA
Shared published services3 shared services · view billing descriptions
56%Service-mix similarity~15.2 milesView profile →
Kenneth Robert Diddie, M.D.
Ophthalmology (CMS) · Westlake Village, CA
Shared published services3 shared services · view billing descriptions
51%Service-mix similarity~11.8 milesView profile →
Michael Thomas Ragen, M.D.
Ophthalmology · Plastic And Reconstructive Surgery (CMS) · Camarillo, CA
Shared published services3 shared services · view billing descriptions
39%Service-mix similarity~23.3 milesView profile →
Robert E Levine, M.D.
Ophthalmology (CMS) · Beverly Hills, CA
Shared published services1 shared services · view billing descriptions
23%Service-mix similarity~17.4 milesView profile →
Albert Baktanian, M.D.
Ophthalmology (CMS) · Glendale, CA
Shared published services3 shared services · view billing descriptions
18%Service-mix similarity~23.2 milesView 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 approximate distance 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.