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Compare the published Medicare service mix of Thomas John Gianis, M.D. with clinicians in the same registry specialty: Vascular Surgery (CMS).

SAN ANTONIO, TX · Exact areaEdit location

2024 published service data · 35 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Patrick A Hartsell, MD

Cardiac Surgery · Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
75%Service-mix similarityView profile →

Marlin W Causey, M.D.

General Surgery · Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Ultrasound of one leg arteries or artery grafts (93926)
71%Service-mix similarityView profile →

Demetrios N Macris, M.D.

Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Ultrasound of one leg arteries or artery grafts (93926)
67%Service-mix similarityView profile →

William Overton Kirk, MD

General Surgery · Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Ultrasound of one leg arteries or artery grafts (93926)
66%Service-mix similarityView profile →

Christine Johnson, MD

Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
66%Service-mix similarityView profile →

Lois A Fiala, MD

Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Ultrasound of one leg arteries or artery grafts (93926)
63%Service-mix similarityView profile →

Kevin Engledow, DO

General Surgery · Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
62%Service-mix similarityView profile →

Syed Zulfiqar Hyder Rizvi, M.D.

General Surgery · Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
62%Service-mix similarityView profile →

Lori Cindrick Pounds, M.D.

Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Ultrasound of one leg arteries or artery grafts (93926)
61%Service-mix similarityView profile →

Boulos Toursarkissian, MD

General Surgery · Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
59%Service-mix similarityView profile →

Celso Frederick Uribe, M.D.

Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
59%Service-mix similarityView profile →

Matthew Jay Sideman, MD

General Surgery · Vascular Surgery (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Ultrasound study of arm and leg arteries (93922)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
57%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.