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Compare the published Medicare service mix of Silas Huston Williams, M.D. with clinicians in the same registry specialty: Interventional Radiology (CMS).

MO · Exact areaEdit location

2024 published service data · 62 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

William B Lea, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · Cape Girardeau, MO

Shared published services
3 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
  • Biopsy and aspiration of bone marrow sample for diagnosis (38222)
52%Service-mix similarityView profile →

Joley Beeler O'callahan, MD

Interventional Radiology (CMS) · North Kansas City, MO

Shared published services
3 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for needle placement (77002)
52%Service-mix similarityView profile →

Nathan Aliyah Saucier, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · Kansas City, MO

Shared published services
3 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for needle placement (77002)
52%Service-mix similarityView profile →

Carlos Javier Guevara, MD

Diagnostic Radiology · Interventional Radiology (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
  • Complete ultrasound study of arm and leg arteries (93923)
51%Service-mix similarityView profile →

Ali Malik, M.D.

Diagnostic Radiology · Interventional Radiology · Radiation Oncology (CMS) · Creve Coeur, MO

Shared published services
3 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
50%Service-mix similarityView profile →

Suresh Vedantham, MD

Diagnostic Radiology · Interventional Radiology (CMS) · Saint Louis, MO

Shared published services
2 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
49%Service-mix similarityView profile →

Millie Liao, DO

Interventional Radiology (CMS) · Saint Louis, MO

Shared published services
2 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
48%Service-mix similarityView profile →

Arash Michael Saemi, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · Columbia, MO

Shared published services
3 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
  • Ultrasonic guidance for needle placement (76942)
48%Service-mix similarityView profile →

David Roy Owens, DO

Diagnostic Radiology · Interventional Radiology (CMS) · Fenton, MO

Shared published services
3 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
46%Service-mix similarityView profile →

Pavan Kumar Kavali, MD

Diagnostic Radiology · Interventional Radiology (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
  • Fluoroscopic guidance for insertion or removal of central vein access device (77001)
46%Service-mix similarityView profile →

Naganathan Bhagvathy Mani, MD

Interventional Radiology (CMS) · Saint Louis, MO

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

Amir Ata Rahnemai Azar, MD

Diagnostic Radiology (CMS) · Saint Louis, MO

Shared published services
3 shared services · view billing descriptions
  • Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)
  • Ultrasonic guidance for blood vessel access (76937)
  • Complete ultrasound study of arm and leg arteries (93923)
44%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.