A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Timothy J Oconnell, MD with clinicians in the same registry specialty: Diagnostic Radiology · Interventional Radiology (CMS).

CLARENDON HILLS, IL · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 157 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Donna S. Kim, M.D.

Diagnostic Radiology (CMS) · Hinsdale, IL

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)
86%Service-mix similarity~1.5 milesView profile →

Howard K. O'neil, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · Downers Grove, IL

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 similarity~3.0 milesView profile →

Tony Kim, M.D.

Diagnostic Radiology (CMS) · Hinsdale, IL

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 similarity~1.5 milesView profile →

Hisham Alwakkaa

Diagnostic Radiology (CMS) · Woodridge, IL

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 similarity~5.7 milesView profile →

Gaston Andre Saint-Martin, M.D.

Diagnostic Radiology · Pathology (CMS) · Hinsdale, IL

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)
82%Service-mix similarity~1.5 milesView profile →

Stephanie Rosania, MD

Diagnostic Radiology (CMS) · Melrose Park, IL

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)
82%Service-mix similarity~8.8 milesView profile →

Sivaraja Kuppuswami, M.D.

Diagnostic Radiology (CMS) · Downers Grove, IL

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)
82%Service-mix similarity~3.0 milesView profile →

Vladislav I Gorengaut, MD

Diagnostic Radiology (CMS) · La Grange, IL

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 similarity~4.6 milesView profile →

Jeffrey Kuei

Diagnostic Radiology (CMS) · Maywood, IL

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 similarity~8.2 milesView profile →

Nathan Fedors, M.D.

Diagnostic Radiology (CMS) · Maywood, IL

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 similarity~8.2 milesView profile →

Alan M Simon, MD

Diagnostic Radiology (CMS) · Elmhurst, IL

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 similarity~6.7 milesView profile →

Gerald Paul Camren, M.D.

Diagnostic Radiology (CMS) · Maywood, IL

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 similarity~8.2 milesView 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 approximate distance 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.