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

SAN DIEGO, CA · Exact areaEdit location

2024 published service data · 231 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Anthony Tuan Ton, MD

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
69%Service-mix similarityView profile →

Lydia Canavan, M.D.

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
1 shared services · view billing descriptions
  • Screening mammography (77067)
58%Service-mix similarityView profile →

Alexander Chong-Koang Hsu, MD

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
57%Service-mix similarityView profile →

Christopher Martin Blackwell, MD

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of abdomen and pelvis without contrast (74176)
56%Service-mix similarityView profile →

James J Ellingson, M.D.

Interventional Radiology · Radiation Oncology (CMS) · San Diego, CA

Shared published services
2 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
56%Service-mix similarityView profile →

Priya Bhikha Patel, M.B.CH.B

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of abdomen and pelvis without contrast (74176)
56%Service-mix similarityView profile →

David Fox, MD

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of abdomen and pelvis without contrast (74176)
53%Service-mix similarityView profile →

Geoffrey Ian Criqui, MD

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
1 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
52%Service-mix similarityView profile →

Marzban Rad, M.D.

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Screening mammography (77067)
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
51%Service-mix similarityView profile →

Charles Varnishung, MD

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of abdomen and pelvis without contrast (74176)
50%Service-mix similarityView profile →

Christopher William Park, MD

Diagnostic Radiology (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of abdomen and pelvis without contrast (74176)
49%Service-mix similarityView profile →

Courtney Cecile Carter, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · San Diego, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of abdomen and pelvis without contrast (74176)
48%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.