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Similar work.
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Compare the published Medicare service mix of Christopher Allan Johner, M.D. with clinicians in the same registry specialty: Anesthesiology.

CHARLESTON, SC · Exact areaEdit location

2024 published service data · 178 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Brystol Cagle, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
92%Service-mix similarityView profile →

Anushri Vijay Desai, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
87%Service-mix similarityView profile →

Eric Calver Swanson, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
86%Service-mix similarityView profile →

John Douglas Mcdonald, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
73%Service-mix similarityView profile →

Matthew L Grabowski, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
69%Service-mix similarityView profile →

Jared Stewart Mckinnon, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
59%Service-mix similarityView profile →

David Brian Carroll, D.O.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
54%Service-mix similarityView profile →

Randal M Atkinson, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Anesthesia for procedure to assess heart electrical activity (00537)
  • Anesthesia for insertion of permanent heart pacemaker (00530)
54%Service-mix similarityView profile →

Shane Vincent Cherry, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
  • Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)
53%Service-mix similarityView profile →

Toby B Steinberg, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
51%Service-mix similarityView profile →

Loren Rae Francis, M.D.

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
48%Service-mix similarityView profile →

George Burke Whitener, MD

Anesthesiology · Charleston, SC

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Anesthesia for procedure to assess heart electrical activity (00537)
45%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.