A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Ilan Hartstein, M.D. with clinicians in the same registry specialty: Ophthalmology.

CA · Exact areaEdit location

2024 published service data · 500 eligible profiles compared. This search reached its 500-profile comparison limit, using NPI order. Narrow the location for a more focused comparison. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Kristin Elizabeth Nesburn, MD

Ophthalmology · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
91%Service-mix similarityView profile →

Mark H Kramar, M.D.

Ophthalmology · Encino, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
89%Service-mix similarityView profile →

Michelle Sato, M.D.

Ophthalmology · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
88%Service-mix similarityView profile →

Jessica J Wong, MD

Ophthalmology · Glendale, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
87%Service-mix similarityView profile →

Richard Lawrence Rabin, MD

Ophthalmology · Walnut Creek, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
86%Service-mix similarityView profile →

Cynthia S. Chiu, M.D.

Ophthalmology · Oakland, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
85%Service-mix similarityView profile →

Andrew Xingyu Zhou, MD

Ophthalmology · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
85%Service-mix similarityView profile →

Michael Alexan Kapamajian, M.D.

Ophthalmology · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
85%Service-mix similarityView profile →

Fusun Ozlen Gokmen Fowler, M.D.

Ophthalmology · Sacramento, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
84%Service-mix similarityView profile →

Bach Lan Linda Vu, MD

Ophthalmology · Monterey Park, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
84%Service-mix similarityView profile →

David Philip Simon, M.D.

Ophthalmology · Travis Afb, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
84%Service-mix similarityView profile →

Gayle C Howard, M.D.

Ophthalmology · Chula Vista, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
  • Imaging of retina (92134)
84%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.