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Compare the published Medicare service mix of Ara Ketchedjian, M.D. with clinicians in the same registry specialty: Cardiac Surgery · Thoracic Surgery (CMS).

BOSTON, MA · Exact areaEdit location

2024 published service data · 63 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Panayotis Vardas

Thoracic Surgery (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • Coronary artery bypass using artery graft, 1 graft (33533)
63%Service-mix similarityView profile →

Hassan Rastegar, MD

General Surgery · Thoracic Surgery (CMS) · Boston, MA

Shared published services
1 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
61%Service-mix similarityView profile →

Ealaf Shemmeri, MD, PHARMD

General Surgery · Thoracic Surgery (CMS) · Boston, MA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
56%Service-mix similarityView profile →

Aaron Sparks

Cardiac Surgery · Thoracic Surgery (CMS) · Boston, MA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • Coronary artery bypass using artery graft, 1 graft (33533)
55%Service-mix similarityView profile →

Asishana A Osho, MD

Thoracic Surgery (CMS) · Boston, MA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • Coronary artery bypass using artery graft, 1 graft (33533)
52%Service-mix similarityView profile →

Laurence H Brinckerhoff, M.D.

Specialty details in registry · Boston, MA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
48%Service-mix similarityView profile →

David C Liu, MD

Cardiac Surgery · Emergency Medicine · General Surgery (CMS) · Boston, MA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • Coronary artery bypass using artery graft, 1 graft (33533)
48%Service-mix similarityView profile →

Brian Whang, M.D.

Thoracic Surgery (CMS) · Boston, MA

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
48%Service-mix similarityView profile →

Travis D Hull, MD

Cardiac Surgery (CMS) · Boston, MA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • Coronary artery bypass using artery graft, 1 graft (33533)
48%Service-mix similarityView profile →

Louis Chu, M.D.

Cardiac Surgery · Thoracic Surgery (CMS) · Boston, MA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • Coronary artery bypass using artery graft, 1 graft (33533)
47%Service-mix similarityView profile →

Yong Zhan, M.D.

Thoracic Surgery (CMS) · Boston, MA

Shared published services
2 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
  • Coronary artery bypass using artery graft, 1 graft (33533)
40%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.