A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

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

CA · Exact areaEdit location

2024 published service data · 500 eligible profiles compared. This search reached its 500-profile comparison limit, using NPI order. Narrow the location for a more focused comparison. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Vu D Truong, D.O.

Diagnostic Radiology (CMS) · Sacramento, 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)
87%Service-mix similarityView profile →

Gary Martin Hatch, M.D.

Specialty details in registry · San Luis Obispo, 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)
85%Service-mix similarityView profile →

Liang Danny Ge, MD

Diagnostic Radiology (CMS) · San Francisco, 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)
85%Service-mix similarityView profile →

David Bruce Jackson, M.D.

Diagnostic Radiology (CMS) · Chino Hills, 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)
84%Service-mix similarityView profile →

Cindy Nguyen Sirois, M.D.

Diagnostic Radiology (CMS) · Carmichael, 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)
84%Service-mix similarityView profile →

John Charles Kirby, D.O.

Diagnostic Radiology · Interventional Radiology (CMS) · Anaheim, 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)
83%Service-mix similarityView profile →

Nasiem Marriam Niroumand, M.D.

Diagnostic Radiology (CMS) · Los Angeles, 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)
83%Service-mix similarityView profile →

David Lewis Lamar, M.D.

Diagnostic Radiology (CMS) · El Segundo, 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)
81%Service-mix similarityView profile →

Michael Witkosky, M.D.

Diagnostic Radiology (CMS) · Sacramento, 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)
81%Service-mix similarityView profile →

Doron Ben Avi, MD

Diagnostic Radiology (CMS) · Los Angeles, 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)
81%Service-mix similarityView profile →

Avanee S Peel, M.D.

Diagnostic Radiology (CMS) · La Jolla, 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)
81%Service-mix similarityView profile →

Garth Howland Harley, MD

Diagnostic Radiology · General Practice (CMS) · Tracy, 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)
80%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.