A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Derk D. Purcell, M.D. with clinicians in the same registry specialty: Diagnostic Radiology (CMS).

SAN FRANCISCO, CA · Exact areaEdit location

2024 published service data · 206 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Jerome A. Barakos, M.D.

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Mri scan of brain without contrast (70551)
  • Mri scan of brain before and after contrast (70553)
89%Service-mix similarityView profile →

Amy Ho Huang, MD

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Mri scan of brain without contrast (70551)
  • Mri scan of brain before and after contrast (70553)
85%Service-mix similarityView profile →

Mohammad Matthew Fakhri, M.D.

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Mri scan of brain without contrast (70551)
  • Mri scan of brain before and after contrast (70553)
83%Service-mix similarityView profile →

Jeffrey David Rudie, MD PHD

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Mri scan of brain without contrast (70551)
  • Mri scan of brain before and after contrast (70553)
80%Service-mix similarityView profile →

David R. Priest, MD

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Screening 3d breast mammography (77063)
  • Screening mammography (77067)
79%Service-mix similarityView profile →

Willy Tjong

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Mri scan of brain without contrast (70551)
  • Mri scan of brain before and after contrast (70553)
79%Service-mix similarityView profile →

Nathan Thomas Mortensen, D.O.

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Mri scan of brain without contrast (70551)
  • Mri scan of brain before and after contrast (70553)
79%Service-mix similarityView profile →

Douglas Rene Bourgon, M.D.

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Screening 3d breast mammography (77063)
  • Screening mammography (77067)
79%Service-mix similarityView profile →

Judong Pan, M.D.

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Screening 3d breast mammography (77063)
  • Screening mammography (77067)
78%Service-mix similarityView profile →

Brian Trinh

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Mri scan of brain without contrast (70551)
  • Mri scan of brain before and after contrast (70553)
78%Service-mix similarityView profile →

Flora Stepansky, M.D.

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Screening 3d breast mammography (77063)
  • Screening mammography (77067)
77%Service-mix similarityView profile →

Francisco Lazaga, MD

Diagnostic Radiology · Nuclear Medicine (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Screening 3d breast mammography (77063)
  • Screening mammography (77067)
77%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.