A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Aaron Kwan, O.D. with clinicians in the same registry specialty: Optometrist.

SAN MATEO, CA · Exact areaEdit location

2024 published service data · 9 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Clarissa Sin, O.D.

Optometrist · San Mateo, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
69%Service-mix similarityView profile →

Sandra Cheng, OD

Optometrist · San Mateo, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
  • New patient complete exam of visual system (92004)
59%Service-mix similarityView profile →

Gary On-Tai Lai, O.D.

Optometrist · San Mateo, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
55%Service-mix similarityView profile →

Gary Hamill

Optometrist · San Mateo, CA

Shared published services
1 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
55%Service-mix similarityView profile →

Marcie Ellen Arnesty, O.D.

Optometrist · San Mateo, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
45%Service-mix similarityView profile →

William Yuan To, OD

Optometrist · San Mateo, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
28%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.