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Compare the published Medicare service mix of Robert John Mcdonald, MD with clinicians in the same registry specialty: Diagnostic Radiology · Nuclear Medicine (CMS).

CASA GRANDE, AZ · 50 milesEdit location
Within 50 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 · 188 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Benjamin Benson, MD

Diagnostic Radiology (CMS) · Gilbert, AZ

Shared published services
3 shared services · view billing descriptions
  • Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries (A9552)
  • Ct scan of chest with contrast (71260)
  • Nuclear medicine study from skull base to mid-thigh with ct scan (78815)
37%Service-mix similarity~33.9 milesView profile →

Mahdieh Haji Amou Assar, MD

Diagnostic Radiology (CMS) · Phoenix, AZ

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of chest without contrast (71250)
34%Service-mix similarity~45.6 milesView profile →

James B. Lyons, M.D.

Diagnostic Radiology · Interventional Radiology (CMS) · Mesa, AZ

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • Nuclear medicine study from skull base to mid-thigh with ct scan (78815)
  • Ct scan of abdomen and pelvis with contrast (74177)
33%Service-mix similarity~37.2 milesView profile →

Amarpreet Bhowra, M.D.

Diagnostic Radiology (CMS) · Phoenix, AZ

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of chest without contrast (71250)
32%Service-mix similarity~49.2 milesView profile →

Penny Lee Bowen, M.D.

Diagnostic Radiology (CMS) · Mesa, AZ

Shared published services
3 shared services · view billing descriptions
  • Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries (A9552)
  • Ct scan of chest with contrast (71260)
  • Nuclear medicine study from skull base to mid-thigh with ct scan (78815)
31%Service-mix similarity~36.9 milesView profile →

Christopher Charles May, MD

Diagnostic Radiology · Nuclear Medicine (CMS) · Scottsdale, AZ

Shared published services
3 shared services · view billing descriptions
  • Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries (A9552)
  • Ct scan of chest with contrast (71260)
  • Nuclear medicine study from skull base to mid-thigh with ct scan (78815)
31%Service-mix similarity~44.9 milesView profile →

Kimberly Brown Brockenbrough, M.D.

Diagnostic Radiology (CMS) · Phoenix, AZ

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of chest without contrast (71250)
31%Service-mix similarity~44.6 milesView profile →

Susan Passalaqua, M.D.

Diagnostic Radiology · Nuclear Medicine (CMS) · Gilbert, AZ

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • Nuclear medicine study from skull base to mid-thigh with ct scan (78815)
  • Ct scan of abdomen and pelvis with contrast (74177)
30%Service-mix similarity~33.9 milesView profile →

John C Chang, M.D.

Diagnostic Radiology (CMS) · Gilbert, AZ

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • Nuclear medicine study from skull base to mid-thigh with ct scan (78815)
  • Ct scan of abdomen and pelvis with contrast (74177)
30%Service-mix similarity~33.9 milesView profile →

Olga Kalinkin, M.D.

Cardiovascular Disease (Cardiology) · Diagnostic Radiology (CMS) · Phoenix, AZ

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of chest without contrast (71250)
29%Service-mix similarity~49.2 milesView profile →

Andrew Edward Liguori, DO

Diagnostic Radiology (CMS) · Phoenix, AZ

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of chest without contrast (71250)
29%Service-mix similarity~49.2 milesView profile →

Jaspreet Kaur Bisla, M.D.

Diagnostic Radiology (CMS) · Gilbert, AZ

Shared published services
3 shared services · view billing descriptions
  • Ct scan of chest with contrast (71260)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Ct scan of chest without contrast (71250)
29%Service-mix similarity~33.9 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.