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Compare the published Medicare service mix of Mark Shillington, M.D. with clinicians in the same registry specialty: Anesthesiology.

SALT LAKE CITY, UT · Exact areaEdit location

2024 published service data · 108 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

James L. Dillon, MD

Anesthesiology · Salt Lake City, UT

Shared published services
3 shared services · view billing descriptions
  • Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Ultrasonic guidance for blood vessel access (76937)
54%Service-mix similarityView profile →

Simon Anthony Martin, M.D.

Anesthesiology · Salt Lake City, UT

Shared published services
3 shared services · view billing descriptions
  • Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Ultrasonic guidance for blood vessel access (76937)
48%Service-mix similarityView profile →

Michael James Barrus, MD

Anesthesiology · Salt Lake City, UT

Shared published services
3 shared services · view billing descriptions
  • Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Ultrasonic guidance for blood vessel access (76937)
45%Service-mix similarityView profile →

Alastair E. Moody, MD

Anesthesiology · Salt Lake City, UT

Shared published services
1 shared services · view billing descriptions
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
41%Service-mix similarityView profile →

Jeffrey B Horn

Anesthesiology · Salt Lake City, UT

Shared published services
1 shared services · view billing descriptions
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
41%Service-mix similarityView profile →

Isaac Cherrington Morris, M.D.

Anesthesiology · Salt Lake City, UT

Shared published services
1 shared services · view billing descriptions
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
41%Service-mix similarityView profile →

Kenward Borg Johnson, MD

Anesthesiology · Salt Lake City, UT

Shared published services
1 shared services · view billing descriptions
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
41%Service-mix similarityView profile →

Jacob Whittle, MD

Anesthesiology · Salt Lake City, UT

Shared published services
1 shared services · view billing descriptions
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
41%Service-mix similarityView profile →

Nathaniel K Richins, DO

Anesthesiology · Salt Lake City, UT

Shared published services
1 shared services · view billing descriptions
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
41%Service-mix similarityView profile →

Jason P Harig, M.D.

Anesthesiology · Salt Lake City, UT

Shared published services
2 shared services · view billing descriptions
  • Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
39%Service-mix similarityView profile →

David Warner Smith, MD

Anesthesiology · Salt Lake City, UT

Shared published services
2 shared services · view billing descriptions
  • Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
39%Service-mix similarityView profile →

Henry C. Norris, MD

Anesthesiology · Salt Lake City, UT

Shared published services
1 shared services · view billing descriptions
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
35%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.