A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Richard Alan Williams, MD with clinicians in the same registry specialty: Specialty details in registry.

SANTA CRUZ, CA · Exact areaEdit location

2024 published service data · 18 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Leping Pu, MD

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Screening 3d breast mammography (77063)
69%Service-mix similarityView profile →

Jennifer C. Lin, M.D.

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Screening 3d breast mammography (77063)
67%Service-mix similarityView profile →

Roy Elias Martinez, M.D.

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
65%Service-mix similarityView profile →

Kevin Matthew Mchugh, M.D.

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
61%Service-mix similarityView profile →

Nicholas Astromoff, MD

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
60%Service-mix similarityView profile →

Hoang Anh Tran Vo, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
56%Service-mix similarityView profile →

Evan Sirc, MD

Diagnostic Radiology · Nuclear Medicine (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
54%Service-mix similarityView profile →

Thomas Nguyen, M.D.

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • Screening 3d breast mammography (77063)
  • Screening mammography (77067)
54%Service-mix similarityView profile →

Monica Harish, MD

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • Ct scan head or brain without contrast (70450)
  • X-ray of shoulder, minimum of 2 views (73030)
54%Service-mix similarityView profile →

Nicholas Thomas Rudnick, M.D.

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
  • Ct scan of abdomen and pelvis with contrast (74177)
53%Service-mix similarityView profile →

Peter Yi Shen, MD

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
52%Service-mix similarityView profile →

Dustin Newell, MD

Diagnostic Radiology (CMS) · Santa Cruz, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
50%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.