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Compare the published Medicare service mix of John Marshall Robertson, MD with clinicians in the same registry specialty: Thoracic Surgery · Vascular Surgery (CMS).

CA · Exact areaEdit location

2024 published service data · 307 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Conrad Massimo Vial, M.D.

Cardiac Surgery (CMS) · San Francisco, CA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
100%Service-mix similarityView profile →

Armin Kiankhooy, MD

Cardiac Surgery · Thoracic Surgery (CMS) · Saint Helena, CA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
88%Service-mix similarityView profile →

Asvin Minoo Ganapathi, M.D.

Cardiac Surgery · Thoracic Surgery (CMS) · Thousand Oaks, CA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
83%Service-mix similarityView profile →

David Mccann Williams, M.D.

Cardiac Surgery · Thoracic Surgery (CMS) · La Jolla, CA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
77%Service-mix similarityView profile →

Anson Michael Lee, M.D.

Cardiac Surgery (CMS) · Palo Alto, CA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
74%Service-mix similarityView profile →

Teng C Lee, M.D.

Thoracic Surgery (CMS) · San Francisco, CA

Shared published services
1 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
73%Service-mix similarityView profile →

Patrick Keith Griffith, M.D.

Cardiac Surgery · General Surgery · Thoracic Surgery (CMS) · Laguna Hills, CA

Shared published services
1 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
73%Service-mix similarityView profile →

Eugene M Golts, M.D.

Thoracic Surgery · Vascular Surgery (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
73%Service-mix similarityView profile →

John M Stoneburner, M.D.

Thoracic Surgery · Vascular Surgery (CMS) · Torrance, CA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
71%Service-mix similarityView profile →

Eriberto Michel, MD

Thoracic Surgery (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
69%Service-mix similarityView profile →

Gavitt Alida Woodard, M.D.

Thoracic Surgery (CMS) · San Francisco, CA

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
68%Service-mix similarityView profile →

Jessica Lynn Hudson, M.D., M.SC., B.S.

Thoracic Surgery (CMS) · San Diego, CA

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
68%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.