A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

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

SANTA ANA, CA · Exact areaEdit location

2024 published service data · 12 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Joseph John Brugman, M.D.

Diagnostic Radiology (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest without contrast (71250)
  • X-ray of chest, 2 views (71046)
  • Mri scan of leg joint without contrast (73721)
45%Service-mix similarityView profile →

David Leonard Rodibaugh, M.D.

Diagnostic Radiology (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest without contrast (71250)
  • X-ray of chest, 2 views (71046)
  • Mri scan of leg joint without contrast (73721)
43%Service-mix similarityView profile →

Patricia Kay Kincaid, M.D.

Diagnostic Radiology (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest without contrast (71250)
  • Ct scan of chest with contrast (71260)
  • Nuclear medicine study from skull base to mid-thigh with ct scan (78815)
38%Service-mix similarityView profile →

Glenda Lee Romero-Urquhart, M.D.

Diagnostic Radiology (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest without contrast (71250)
  • X-ray of chest, 2 views (71046)
  • Mri scan of lower spinal canal without contrast (72148)
30%Service-mix similarityView profile →

Saif Haq Siddiqi, M.D.

Diagnostic Radiology (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest without contrast (71250)
  • Ct scan of chest with contrast (71260)
  • X-ray of chest, 1 view (71045)
29%Service-mix similarityView profile →

Christina Ma, M.D.

Diagnostic Radiology (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest without contrast (71250)
  • Ct scan of chest with contrast (71260)
  • Ct scan of heart with evaluation of blood vessel calcium (75571)
26%Service-mix similarityView profile →

Michael David Brown, D.O.

Diagnostic Radiology (CMS) · Santa Ana, CA

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest without contrast (71250)
  • X-ray of chest, 2 views (71046)
  • Mri scan of leg joint without contrast (73721)
24%Service-mix similarityView profile →

Maurice Yu, M.D.

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

Shared published services
2 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
20%Service-mix similarityView profile →

Martin W. Wieler, M.D.

Diagnostic Radiology (CMS) · Santa Ana, CA

Shared published services
2 shared services · view billing descriptions
  • Mri scan of leg joint without contrast (73721)
  • Mri scan of lower spinal canal without contrast (72148)
19%Service-mix similarityView profile →

Duke Nguyen, M.D.

Diagnostic Radiology (CMS) · Santa Ana, CA

Shared published services
2 shared services · view billing descriptions
  • Ct scan of chest without contrast (71250)
  • Mri scan of leg joint without contrast (73721)
15%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.