A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Ryan John Diel, MD with clinicians in the same registry specialty: Ophthalmology.

IOWA CITY, IA · Exact areaEdit location

2024 published service data · 32 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Jaclyn Marie Haugsdal, M.D.

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Established patient complete exam of visual system (92014)
  • Imaging of retina (92134)
86%Service-mix similarityView profile →

Tyler S Quist, MD

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Established patient complete exam of visual system (92014)
  • Imaging of retina (92134)
83%Service-mix similarityView profile →

Thomas A Oetting, MD

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Imaging of retina (92134)
  • Removal of cataract with insertion of prosthetic lens (66984)
79%Service-mix similarityView profile →

Benjamin Janson, M.D.

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Established patient complete exam of visual system (92014)
  • Imaging of retina (92134)
77%Service-mix similarityView profile →

Lorna Grant, M.D.

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Established patient complete exam of visual system (92014)
  • Imaging of retina (92134)
75%Service-mix similarityView profile →

Matthew S Ward, M.D.

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Established patient complete exam of visual system (92014)
  • Imaging of retina (92134)
73%Service-mix similarityView profile →

Erin A Boese, M.D.

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Imaging of retina (92134)
  • Removal of cataract with insertion of prosthetic lens (66984)
70%Service-mix similarityView profile →

Chris E Watts, M.D.

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Established patient complete exam of visual system (92014)
  • Imaging of retina (92134)
70%Service-mix similarityView profile →

Tyler Benjamin Stohler Risma, MD

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Imaging of retina (92134)
  • Removal of cataract with insertion of prosthetic lens (66984)
69%Service-mix similarityView profile →

Marc Toeteberg-Harms, MD

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Imaging of retina (92134)
  • Removal of cataract with insertion of prosthetic lens (66984)
68%Service-mix similarityView profile →

Mark A Greiner, M.D.

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Established patient complete exam of visual system (92014)
  • Imaging of retina (92134)
65%Service-mix similarityView profile →

Andrew Pouw, M.D.

Ophthalmology · Iowa City, IA

Shared published services
3 shared services · view billing descriptions
  • Measurement of corneal curvature and depth of eye (92136)
  • Imaging of retina (92134)
  • Removal of cataract with insertion of prosthetic lens (66984)
63%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.