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Similar work.
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Compare the published Medicare service mix of Keith Adrian Warren, M.D. with clinicians in the same registry specialty: Ophthalmology.

OVERLAND PARK, KS · Exact areaEdit location

2024 published service data · 10 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Austin Andersen, M.D.

Ophthalmology · Overland Park, KS

Shared published services
3 shared services · view billing descriptions
  • Imaging of retina (92134)
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
53%Service-mix similarityView profile →

Christopher J Pole, M.D.

Ophthalmology · Overland Park, KS

Shared published services
3 shared services · view billing descriptions
  • Imaging of retina (92134)
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
45%Service-mix similarityView profile →

Christopher S Banning, MD

Ophthalmology · Overland Park, KS

Shared published services
3 shared services · view billing descriptions
  • Imaging of retina (92134)
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
42%Service-mix similarityView profile →

Kristin Schmid Biggerstaff, M.D.

Ophthalmology · Overland Park, KS

Shared published services
3 shared services · view billing descriptions
  • Imaging of retina (92134)
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
36%Service-mix similarityView profile →

Timothy B Cavanaugh, MD

Ophthalmology · Overland Park, KS

Shared published services
3 shared services · view billing descriptions
  • Imaging of retina (92134)
  • Established patient complete exam of visual system (92014)
  • New patient complete exam of visual system (92004)
28%Service-mix similarityView profile →

Johann Georg Ohly, MD

Ophthalmology · Overland Park, KS

Shared published services
3 shared services · view billing descriptions
  • Exam of the internal drainage system of eye (92020)
  • Removal of recurring cataract in lens capsule using a laser (66821)
  • Imaging of optic nerve (92133)
20%Service-mix similarityView profile →

Christopher S Ketcherside, MD

Ophthalmology · Overland Park, KS

Shared published services
2 shared services · view billing descriptions
  • Imaging of retina (92134)
  • Removal of recurring cataract in lens capsule using a laser (66821)
15%Service-mix similarityView profile →

Megan Haghnegahdar, MD

Ophthalmology · Overland Park, KS

Shared published services
1 shared services · view billing descriptions
  • Imaging of retina (92134)
11%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.