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Compare the published Medicare service mix of Eric D Ludwig, O.D. with clinicians in the same registry specialty: Optometrist.

PORT JEFFERSON, NY · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 18 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Anthony Modesto, OD

Optometrist · Miller Place, NY

Shared published services
3 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Photography of the retina (92250)
  • Established patient complete exam of visual system (92014)
85%Service-mix similarity~3.6 milesView profile →

Jeffrey Kraushaar, O.D.

Optometrist · Shoreham, NY

Shared published services
3 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Photography of the retina (92250)
  • Established patient complete exam of visual system (92014)
83%Service-mix similarity~8.8 milesView profile →

Howard Kessler, O.D.

Optometrist · Port Jefferson Station, NY

Shared published services
3 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Photography of the retina (92250)
  • Established patient complete exam of visual system (92014)
83%Service-mix similarity~2.3 milesView profile →

Brian Ludwig

Optometrist · Setauket, NY

Shared published services
3 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Photography of the retina (92250)
  • Established patient complete exam of visual system (92014)
81%Service-mix similarity~2.6 milesView profile →

Wei Zhang, O.D.

Optometrist · Centereach, NY

Shared published services
3 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Photography of the retina (92250)
  • Established patient complete exam of visual system (92014)
73%Service-mix similarity~5.3 milesView profile →

Justin Daniel Kraushaar, O.D.

Optometrist · Shoreham, NY

Shared published services
3 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Photography of the retina (92250)
  • Established patient complete exam of visual system (92014)
71%Service-mix similarity~8.8 milesView profile →

Pooja Berdia, OD

Optometrist · Shoreham, NY

Shared published services
2 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Photography of the retina (92250)
70%Service-mix similarity~8.8 milesView profile →

Barnett Theodore Schrier, O.D.

Optometrist · Stony Brook, NY

Shared published services
2 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Established patient complete exam of visual system (92014)
70%Service-mix similarity~4.4 milesView profile →

Vincent Coltellino, OD

Optometrist · Coram, NY

Shared published services
2 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Established patient complete exam of visual system (92014)
69%Service-mix similarity~5.1 milesView profile →

Nusrat Jahan, OD

Optometrist · Miller Place, NY

Shared published services
3 shared services · view billing descriptions
  • New patient complete exam of visual system (92004)
  • Photography of the retina (92250)
  • Established patient complete exam of visual system (92014)
69%Service-mix similarity~3.6 milesView profile →

Julie Demartini, O.D.

Optometrist · Port Jefferson Station, NY

Shared published services
2 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
61%Service-mix similarity~2.3 milesView profile →

Gwenda Renee' Gnadt, O.D., M.P.H.

Optometrist · Nesconset, NY

Shared published services
3 shared services · view billing descriptions
  • Photography of the retina (92250)
  • Established patient complete exam of visual system (92014)
  • Established patient problem focused exam of visual system (92012)
53%Service-mix similarity~8.2 milesView 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 approximate distance 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.