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Compare the published Medicare service mix of Mark R Winckler, OD with clinicians in the same registry specialty: Optometrist.

SD · Exact areaEdit location

2024 published service data · 180 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Elizabeth Ann Ellender, O.D.

Optometrist · Rapid City, SD

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)
  • Photography of the retina (92250)
100%Service-mix similarityView profile →

Paul Horner, O.D.

Optometrist · Brandon, SD

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)
  • Photography of the retina (92250)
100%Service-mix similarityView profile →

Antwan Percy Randolph, O.D.

Optometrist · Spearfish, SD

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)
  • Photography of the retina (92250)
93%Service-mix similarityView profile →

Joshua David Tims, O.D.

Optometrist · Sioux Falls, SD

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)
  • Photography of the retina (92250)
91%Service-mix similarityView profile →

Michael Scott Ellender, O.D.

Optometrist · Rapid City, SD

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)
  • Photography of the retina (92250)
90%Service-mix similarityView profile →

Dwayne Robert Ice, O.D.

Optometrist · Rapid City, SD

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)
  • Photography of the retina (92250)
87%Service-mix similarityView profile →

Chad Donald Beynon, O.D.

Optometrist · Watertown, SD

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)
  • Photography of the retina (92250)
87%Service-mix similarityView profile →

Daniel S Rabbitt, OD

Optometrist · N Sioux City, SD

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)
  • Photography of the retina (92250)
86%Service-mix similarityView profile →

Megan Woolery, OD

Optometrist · Sioux Falls, SD

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)
84%Service-mix similarityView profile →

Nancy Lynn Hetland, O.D.

Optometrist · Mitchell, SD

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)
84%Service-mix similarityView profile →

Bethany Lynn Russell, O,D.

Optometrist · Aberdeen, SD

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)
  • Photography of the retina (92250)
83%Service-mix similarityView profile →

Ryan Ellwein, OD

Optometrist · Sioux Falls, SD

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)
83%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.