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Similar work.
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Compare the published Medicare service mix of Tammy N Crumpler, MD with clinicians in the same registry specialty: Diagnostic Radiology (CMS).

BOONE, NC · 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 · 61 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Joseph H Harpole, MD

Diagnostic Radiology · Interventional Radiology (CMS) · Bristol, TN

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)
  • Ct scan head or brain without contrast (70450)
89%Service-mix similarity~37.5 milesView profile →

Glen H Hatcher, M.D.

Diagnostic Radiology (CMS) · Johnson City, TN

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)
  • Ct scan head or brain without contrast (70450)
87%Service-mix similarity~40.1 milesView profile →

Charles D Scheil, M.D.

Specialty details in registry · Hickory, NC

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)
  • Ct scan head or brain without contrast (70450)
86%Service-mix similarity~36.9 milesView profile →

Adrian W Holtzman, MD

Diagnostic Radiology (CMS) · Hickory, NC

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)
  • Ct scan head or brain without contrast (70450)
86%Service-mix similarity~36.9 milesView profile →

Vincent Gerard Becker, M.D.

Specialty details in registry · Johnson City, TN

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)
  • Ct scan head or brain without contrast (70450)
86%Service-mix similarity~40.1 milesView profile →

Gregory Francis Felix Evans, M.D.

Diagnostic Radiology · Pain Management (CMS) · N Wilkesboro, NC

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)
  • Ct scan head or brain without contrast (70450)
86%Service-mix similarity~30.2 milesView profile →

John Kenny Mclarney, M.D.

Diagnostic Radiology · Interventional Pain Management (CMS) · N Wilkesboro, NC

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)
  • Ct scan head or brain without contrast (70450)
85%Service-mix similarity~30.2 milesView profile →

Matthew D Dyson, M.D.

Diagnostic Radiology (CMS) · Hickory, NC

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)
  • Ct scan head or brain without contrast (70450)
84%Service-mix similarity~36.9 milesView profile →

Maddalena Pizzirusso Duarte, M.D.

Diagnostic Radiology (CMS) · Hickory, NC

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)
  • Ct scan head or brain without contrast (70450)
83%Service-mix similarity~36.9 milesView profile →

Knox R Tate, M.D.

Diagnostic Radiology (CMS) · Hickory, NC

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)
  • Ct scan head or brain without contrast (70450)
83%Service-mix similarity~36.9 milesView profile →

John William Wittenborn, M.D.

Diagnostic Radiology (CMS) · Morganton, NC

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)
  • Ct scan head or brain without contrast (70450)
83%Service-mix similarity~33.3 milesView profile →

Justin Clint Black, MD

Diagnostic Radiology (CMS) · Hickory, NC

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)
  • Ct scan head or brain without contrast (70450)
83%Service-mix similarity~36.9 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.