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Similar work.
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Compare the published Medicare service mix of Charles Soonkyu Ahn, MD with clinicians in the same registry specialty: Ophthalmology.

NAPERVILLE, IL · Exact areaEdit location

2024 published service data · 11 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Scott H Stoller, MD

Ophthalmology · Naperville, IL

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
72%Service-mix similarityView profile →

Daniel F Debartolo, M.D.

Ophthalmology · Naperville, IL

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
64%Service-mix similarityView profile →

Eric Kim, MD

Ophthalmology · Naperville, IL

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
59%Service-mix similarityView profile →

Sachin Jain, M.D.

Ophthalmology · Naperville, IL

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
58%Service-mix similarityView profile →

Anurag Gupta, MD

Ophthalmology · Naperville, IL

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)
  • New patient complete exam of visual system (92004)
45%Service-mix similarityView profile →

Shantan Reddy, MD MPH

Ophthalmology · Naperville, IL

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)
  • New patient complete exam of visual system (92004)
44%Service-mix similarityView profile →

F David Cox, M.D.

Ophthalmology · Naperville, IL

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)
33%Service-mix similarityView profile →

Jogin Jose, MD

Ophthalmology · Naperville, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • Removal of recurring cataract in lens capsule using a laser (66821)
33%Service-mix similarityView profile →

Michael Thomas Andreoli, M.D.

Ophthalmology · Naperville, IL

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)
  • Removal of recurring cataract in lens capsule using a laser (66821)
32%Service-mix similarityView profile →

Michael A Grassi, MD

Ophthalmology · Naperville, IL

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)
  • New patient complete exam of visual system (92004)
29%Service-mix similarityView profile →

Michelle E Andreoli, MD

Ophthalmology · Naperville, IL

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)
  • New patient complete exam of visual system (92004)
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.