A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Ai (Theresa) Diem Nguyen, O.D. with clinicians in the same registry specialty: Optometrist.

SAN DIEGO, CA · Exact areaEdit location

2024 published service data · 80 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Stephen Huang, O.D.

Optometrist · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
  • Established patient problem focused exam of visual system (92012)
90%Service-mix similarityView profile →

Annie Tsuen Chin, O.D.

Optometrist · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
  • Established patient problem focused exam of visual system (92012)
88%Service-mix similarityView profile →

Allison Pierce, OD

Optometrist · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
  • Established patient problem focused exam of visual system (92012)
85%Service-mix similarityView profile →

Jane D. Goodwin, O.D.

Optometrist · San Diego, 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)
  • Exam of visual field with extended testing (92083)
76%Service-mix similarityView profile →

Adriana Sanchez, O.D.

Optometrist · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
  • Established patient problem focused exam of visual system (92012)
75%Service-mix similarityView profile →

Samuel Milton White, OD

Optometrist · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
73%Service-mix similarityView profile →

Matthew Langford, O.D.

Optometrist · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
72%Service-mix similarityView profile →

David I Geffen, O.D.

Optometrist · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
  • Established patient problem focused exam of visual system (92012)
69%Service-mix similarityView profile →

Kathryn Ordonez, OD

Optometrist · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
  • Exam of visual field with extended testing (92083)
69%Service-mix similarityView profile →

Courtney Lynn Cape, OD

Optometrist · San Diego, 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)
  • Exam of visual field with extended testing (92083)
69%Service-mix similarityView profile →

Christine Thiem, OD

Optometrist · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
68%Service-mix similarityView profile →

Charles Tu, OD

Optometrist · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
66%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.