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Compare the published Medicare service mix of William Alec Tisdall, M.D. with clinicians in the same registry specialty: Anesthesiology · Interventional Pain Management (CMS).

SAN ANTONIO, TX · Exact areaEdit location

2024 published service data · 17 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

William Zachary Smith, M.D.

Interventional Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Injection of substance into middle or upper spine canal using imaging guidance (62321)
63%Service-mix similarityView profile →

Joshua T Shroll, MD, MPH

Interventional Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Injection of substance into middle or upper spine canal using imaging guidance (62321)
61%Service-mix similarityView profile →

Darius Zagunis, M.D.

Interventional Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Injection of substance into middle or upper spine canal using imaging guidance (62321)
58%Service-mix similarityView profile →

Urfan A Dar, M.D.

Anesthesiology · Interventional Pain Management · Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Destruction of lower or sacral spinal facet joint nerves using imaging guidance, each additional facet joint (64636)
56%Service-mix similarityView profile →

Sameer Soliman, M.D.

Anesthesiology · Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Injection of substance into middle or upper spine canal using imaging guidance (62321)
55%Service-mix similarityView profile →

Dmitriy Buyanov, M.D.

Interventional Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Destruction of lower or sacral spinal facet joint nerves using imaging guidance, each additional facet joint (64636)
55%Service-mix similarityView profile →

Kanishka Monis, M.D.

Anesthesiology · Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Injection of substance into middle or upper spine canal using imaging guidance (62321)
55%Service-mix similarityView profile →

Charles William Murphy, M.D.

Anesthesiology · Interventional Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Injection of substance into middle or upper spine canal using imaging guidance (62321)
50%Service-mix similarityView profile →

Brian Starr, M.D.

Specialty details in registry · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Injection of substance into middle or upper spine canal using imaging guidance (62321)
48%Service-mix similarityView profile →

Alexander J Chen, MD

Anesthesiology · Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Injection of substance into middle or upper spine canal using imaging guidance (62321)
47%Service-mix similarityView profile →

Sarah Elizabeth Trampota, MD

Interventional Pain Management (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Destruction of lower or sacral spinal facet joint nerves using imaging guidance, each additional facet joint (64636)
46%Service-mix similarityView profile →

Sergio Jose Alvarado, M.D.

Anesthesiology · Interventional Pain Management · Pediatric Medicine · Physical Medicine And Rehabilitation (CMS) · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level (64484)
  • Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)
  • Injection of substance into middle or upper spine canal using imaging guidance (62321)
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.