A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

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

ORANGE, CA · Exact areaEdit location

2024 published service data · 67 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Cato Chan

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
88%Service-mix similarityView profile →

Sohrab Nazertehrani, MD

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
86%Service-mix similarityView profile →

Deniz Akay Urgun, M.D.

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
81%Service-mix similarityView profile →

Mani Seetharaman, MD

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
80%Service-mix similarityView profile →

Wesley Oh

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
71%Service-mix similarityView profile →

Dylan Denault, DO

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
71%Service-mix similarityView profile →

Amir Imanzadeh, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
62%Service-mix similarityView profile →

Dan Vu, M.D.

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
50%Service-mix similarityView profile →

Tariq Hameed, MD

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
48%Service-mix similarityView profile →

Pejman Preston Hedayati, M.D.

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
47%Service-mix similarityView profile →

Samir Hemendra Shah, M.D.

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
42%Service-mix similarityView profile →

Brent Olson, MD

Diagnostic Radiology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
  • Ct scan of chest without contrast (71250)
41%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.