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

CA · Exact areaEdit location

2024 published service data · 154 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Jessica Chi-Min Tan, M.D

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ultrasound scan of head and neck soft tissue (76536)
74%Service-mix similarityView profile →

David Philip Reiner, M.D.

Diagnostic Radiology (CMS) · West Hollywood, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
73%Service-mix similarityView profile →

Karen D Ragland, MD

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
73%Service-mix similarityView profile →

Parminder Singh Deol, M.D.

Diagnostic Radiology (CMS) · Sacramento, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ultrasound scan of head and neck soft tissue (76536)
71%Service-mix similarityView profile →

Courtnay Willcox Bloomer, M.D.

Diagnostic Radiology (CMS) · Walnut Creek, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ultrasound scan of head and neck soft tissue (76536)
71%Service-mix similarityView profile →

Frank Tamura, M.D.

Diagnostic Radiology (CMS) · Fresno, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
70%Service-mix similarityView profile →

Tiffany Tsai, M.D.

Diagnostic Radiology (CMS) · San Francisco, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ultrasound scan of head and neck soft tissue (76536)
70%Service-mix similarityView profile →

Kenneth Cham Ong, M.D.

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

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
69%Service-mix similarityView profile →

Wen Lin, M.D.

Diagnostic Radiology (CMS) · Palo Alto, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • Ultrasound scan of head and neck soft tissue (76536)
  • Ct scan head or brain without contrast (70450)
69%Service-mix similarityView profile →

Lakshminarayan Srinivasan

Diagnostic Radiology (CMS) · Oakland, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
69%Service-mix similarityView profile →

Rajul Pandit, MD

Diagnostic Radiology (CMS) · San Jose, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
69%Service-mix similarityView profile →

Elizabeth Tong, M.D.

Diagnostic Radiology (CMS) · Stanford, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of brain before and after contrast (70553)
  • X-ray of chest, 1 view (71045)
  • Ultrasound scan of head and neck soft tissue (76536)
68%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.