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Compare the published Medicare service mix of Catherine Breck Holznecht, M.D. with clinicians in the same registry specialty: Diagnostic Radiology (CMS).

MADISON, WI · Exact areaEdit location

2024 published service data · 130 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Rasheed Nawaz, MD

Diagnostic Radiology (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
  • Ct scan head or brain without contrast (70450)
85%Service-mix similarityView profile →

Alexander Robert Moeller, MD

Diagnostic Radiology · Internal Medicine (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
  • Ct scan head or brain without contrast (70450)
77%Service-mix similarityView profile →

Allison Couillard, MD

Diagnostic Radiology (CMS) · Madison, WI

Shared published services
2 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
74%Service-mix similarityView profile →

John Erik Winterholler, MD

Diagnostic Radiology (CMS) · Madison, WI

Shared published services
2 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
73%Service-mix similarityView profile →

Nancy Ann Little, MD

Diagnostic Radiology (CMS) · Madison, WI

Shared published services
2 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • Ct scan head or brain without contrast (70450)
73%Service-mix similarityView profile →

Taylor J Sellers, MD

Diagnostic Radiology (CMS) · Madison, WI

Shared published services
2 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
64%Service-mix similarityView profile →

Alexander Richard Mcdonald, MD

Diagnostic Radiology (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
  • Ct scan head or brain without contrast (70450)
64%Service-mix similarityView profile →

Isaiah Wesley Tan, MD

Diagnostic Radiology · Neurology (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
  • Ct scan head or brain without contrast (70450)
63%Service-mix similarityView profile →

Jeannine Ruby, MD

Diagnostic Radiology (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
  • Ct scan head or brain without contrast (70450)
62%Service-mix similarityView profile →

Brett Patrick Sjoberg, MD

Diagnostic Radiology (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
  • Ct scan head or brain without contrast (70450)
61%Service-mix similarityView profile →

Shane Arthur Rassman, DO

Diagnostic Radiology (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
  • Ct scan head or brain without contrast (70450)
59%Service-mix similarityView profile →

Katharine Helena Molinarolo, MD

Diagnostic Radiology · Interventional Radiology (CMS) · Madison, WI

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 1 view (71045)
  • X-ray of chest, 2 views (71046)
  • Ct scan head or brain without contrast (70450)
59%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.