A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

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

ROANOKE, VA · Exact areaEdit location

2024 published service data · 44 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Kelley Kendall Whitmer, MD

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
85%Service-mix similarityView profile →

Vishal Mukesh Patel, M.D.

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
82%Service-mix similarityView profile →

Alfred T Shilling, MD

Diagnostic Radiology · Interventional Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
77%Service-mix similarityView profile →

Ricardo Riegodedios, MD

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
76%Service-mix similarityView profile →

Joseph Arlan Birkman, D.O.

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
75%Service-mix similarityView profile →

Peter Rosenfeld, MD

Diagnostic Radiology · Hematology · Interventional Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
75%Service-mix similarityView profile →

John B Jackson

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
75%Service-mix similarityView profile →

Khursheed Imam, MD

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
74%Service-mix similarityView profile →

Fielding Carter Fitzpatrick, DO

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
73%Service-mix similarityView profile →

Aaron Jun, M.D.

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
72%Service-mix similarityView profile →

Bert Cody Piggott, M.D.

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
72%Service-mix similarityView profile →

Ira G. Shaywitz, M.D.

Diagnostic Radiology (CMS) · Roanoke, VA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan of abdomen and pelvis with contrast (74177)
  • Limited ultrasound scan of abdomen (76705)
71%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.