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Compare the published Medicare service mix of Ramon Alberto Riojas, MD PHD with clinicians in the same registry specialty: Surgery.

BALTIMORE, MD · Exact areaEdit location

2024 published service data · 124 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Mark D. Kligman, M.D.

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
55%Service-mix similarityView profile →

Christopher Jamyn You, M.D.

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
42%Service-mix similarityView profile →

Hamza Aziz, M.D.

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
38%Service-mix similarityView profile →

Hanghang Wang, M.D.

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
37%Service-mix similarityView profile →

Aarti Mathur, M.D

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
36%Service-mix similarityView profile →

Andrea Chao Bafford, M.D.

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
32%Service-mix similarityView profile →

Natalia Kubicki, M.D.

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
32%Service-mix similarityView profile →

Lindsay Kate Hessler, M.D.

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
30%Service-mix similarityView profile →

Tatiana Fedorova, MD

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
30%Service-mix similarityView profile →

Elizabeth Collens Wick, MD

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
29%Service-mix similarityView profile →

Murtaza Yousuf Dawood, M.D.

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • Replacement of aortic valve through the skin and femoral artery (33361)
29%Service-mix similarityView profile →

Keith D Lillemoe

Surgery · Baltimore, MD

Shared published services
1 shared services · view billing descriptions
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
29%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.