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Compare the published Medicare service mix of Ronald N. Gaster, MD with clinicians in the same registry specialty: Ophthalmology.

LONG BEACH, CA · Exact areaEdit location

2024 published service data · 29 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Trinh T Nhu

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Ct scan of cornea (92025)
  • Ultrasound scan of cornea to determine thickness (76514)
60%Service-mix similarityView profile →

Carl T Hartman, MD

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Ct scan of cornea (92025)
  • Ultrasound scan of cornea to determine thickness (76514)
60%Service-mix similarityView profile →

Madeleine Francesca Puig, MD

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Ultrasound scan of cornea to determine thickness (76514)
  • Imaging of optic nerve (92133)
58%Service-mix similarityView profile →

Rodrigo J Torres, MD

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Imaging of optic nerve (92133)
  • Established patient problem focused exam of visual system (92012)
57%Service-mix similarityView profile →

Shalu Gupta, M.D.

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Imaging of optic nerve (92133)
  • Established patient problem focused exam of visual system (92012)
56%Service-mix similarityView profile →

Lars H Hertzog, M.D., F.A.C.S.

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Ultrasound scan of cornea to determine thickness (76514)
  • Imaging of optic nerve (92133)
55%Service-mix similarityView profile →

Maltish Lorenzo

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Imaging of optic nerve (92133)
  • Established patient problem focused exam of visual system (92012)
55%Service-mix similarityView profile →

Laura Syniuta, M.D.

Ophthalmology · Long Beach, CA

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)
52%Service-mix similarityView profile →

Leif M Hertzog, MD

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Imaging of optic nerve (92133)
  • Established patient problem focused exam of visual system (92012)
52%Service-mix similarityView profile →

Hans Dieter Hertzog, M.D.

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Ultrasound scan to determine eye length and lens power (76519)
  • Imaging of optic nerve (92133)
51%Service-mix similarityView profile →

Carlos Enrique Martinez, MD

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Ultrasound scan of cornea to determine thickness (76514)
  • Imaging of optic nerve (92133)
51%Service-mix similarityView profile →

Dwayne Keith Logan, M.D.

Ophthalmology · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient complete exam of visual system (92014)
  • Ct scan of cornea (92025)
  • Ultrasound scan of cornea to determine thickness (76514)
47%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.