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Compare the published Medicare service mix of Matthew Arnold Gahn, O.D. with clinicians in the same registry specialty: Optometrist.

MN · Exact areaEdit location

2024 published service data · 500 eligible profiles compared. This search reached its 500-profile comparison limit, using NPI order. Narrow the location for a more focused comparison. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Rodney Jerome Hess, OD

Optometrist · Elk River, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
90%Service-mix similarityView profile →

Bruce A. Storhaug, O.D.

Optometrist · East Grand Forks, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
86%Service-mix similarityView profile →

Jeffrey Scott Mootz, OD

Optometrist · Le Sueur, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
86%Service-mix similarityView profile →

Christopher Allen Mcdowell, O.D.

Optometrist · Cloquet, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
86%Service-mix similarityView profile →

Kenneth H Ristau, O.D.

Optometrist · Marshall, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
84%Service-mix similarityView profile →

Steven Gus Beals, O.D.

Optometrist · Montevideo, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
84%Service-mix similarityView profile →

Chad R. Dockter, OD

Optometrist · Eden Prairie, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
83%Service-mix similarityView profile →

Joseph Alan Miller, OD

Optometrist · Wadena, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
83%Service-mix similarityView profile →

Thomas Eugene Clark, O.D.

Optometrist · New Ulm, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
82%Service-mix similarityView profile →

Murphy Grotewold

Optometrist · Mankato, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
82%Service-mix similarityView profile →

Peter Lloyd Vatnsdal, O.D.

Optometrist · Roseau, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)
82%Service-mix similarityView profile →

Zachary Lundgren, OD

Optometrist · Wadena, MN

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Established patient complete exam of visual system (92014)
  • Photography of the retina (92250)
82%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.