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Compare the published Medicare service mix of Christopher Vargo, M.D. with clinicians in the same registry specialty: Diagnostic Radiology · Interventional Radiology (CMS).

AUSTIN, TX · Exact areaEdit location

2024 published service data · 15 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Frank Sabatelli, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
44%Service-mix similarityView profile →

Rajiv N Srinivasa, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
39%Service-mix similarityView profile →

Taylor Maloney, MD, RPVI

Diagnostic Radiology · Interventional Radiology (CMS) · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
38%Service-mix similarityView profile →

Preston George Smith, M.D.

Diagnostic Radiology (CMS) · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes (99153)
23%Service-mix similarityView profile →

Newell Dutton, MD

Diagnostic Radiology (CMS) · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
  • Review by radiologist of ct guidance for needle placement (77012)
19%Service-mix similarityView profile →

Sunil Mark Narayan, M.D.

Interventional Radiology (CMS) · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
  • Review by radiologist of ct guidance for needle placement (77012)
18%Service-mix similarityView profile →

Akash Desai, MD

Diagnostic Radiology (CMS) · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
  • Review by radiologist of ct guidance for needle placement (77012)
16%Service-mix similarityView profile →

Gregory C Karnaze, MD

Specialty details in registry · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
  • Review by radiologist of ct guidance for needle placement (77012)
  • Drainage of fluid from abdominal cavity using imaging guidance (49083)
8%Service-mix similarityView profile →

Murali A. Ranjithan, M.D.

Diagnostic Radiology (CMS) · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Ultrasonic guidance for blood vessel access (76937)
  • Review by radiologist of ct guidance for needle placement (77012)
  • Aspiration of fluid from chest cavity using imaging guidance (32555)
7%Service-mix similarityView profile →

John W Kish, MD

Diagnostic Radiology · Interventional Radiology (CMS) · Austin, TX

Shared published services
3 shared services · view billing descriptions
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
  • Drainage of fluid from abdominal cavity using imaging guidance (49083)
  • Aspiration of fluid from chest cavity using imaging guidance (32555)
6%Service-mix similarityView profile →

Michael Mario Di Iorio, MD

Interventional Radiology (CMS) · Austin, TX

Shared published services
1 shared services · view billing descriptions
  • Ultrasonic guidance for needle placement (76942)
5%Service-mix similarityView profile →

Connie I Hsu, MD

Diagnostic Radiology (CMS) · Austin, TX

Shared published services
1 shared services · view billing descriptions
  • Review by radiologist of ct guidance for needle placement (77012)
3%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.