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Similar work.
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Compare the published Medicare service mix of Frederick William Romberg, M.D. with clinicians in the same registry specialty: Anesthesiology.

SANTA ROSA, CA · Exact areaEdit location

2024 published service data · 27 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Robert John Wood, MD

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for exam of colon using an endoscope (00812)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
75%Service-mix similarityView profile →

Kseniya Shvachko, M.D.

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for exam of colon using an endoscope (00812)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
74%Service-mix similarityView profile →

John Walter Nimtz, MD

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
  • Anesthesia for procedure on nerves, muscles, tendons, and tissue of forearm, wrist, and hand (01810)
67%Service-mix similarityView profile →

Margaret Anne Mcevoy, MD

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for exam of colon using an endoscope (00812)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
66%Service-mix similarityView profile →

Adeyemi Ogunkoya, MD

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for exam of colon using an endoscope (00812)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
63%Service-mix similarityView profile →

Catherine Mariano Roby, DO

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
  • Anesthesia for procedure on small and large bowel using an endoscope (00813)
60%Service-mix similarityView profile →

Adrian Chase

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for exam of colon using an endoscope (00812)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
59%Service-mix similarityView profile →

Roberto Neisa, M.D.

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for exam of colon using an endoscope (00812)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
59%Service-mix similarityView profile →

Darin Dee Brunson, MD

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for exam of colon using an endoscope (00812)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
57%Service-mix similarityView profile →

Peter Thornhill, MD, MS

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for exam of colon using an endoscope (00812)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
56%Service-mix similarityView profile →

Edward Jean Gregoire, MD

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for exam of colon using an endoscope (00812)
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
52%Service-mix similarityView profile →

Ripika Bedi, DO

Anesthesiology · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)
  • Anesthesia for other procedure on large bowel using an endoscope (00811)
  • Anesthesia for procedure on small and large bowel using an endoscope (00813)
52%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.