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Compare the published Medicare service mix of Spencer Roberson, MD with clinicians in the same registry specialty: Anesthesiology.

FLAGSTAFF, AZ · Exact areaEdit location

2024 published service data · 20 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Matthew Fenn Lindstrom, M.D.

Anesthesiology · Flagstaff, AZ

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
  • Anesthesia for x-ray or radiation therapy (01922)
94%Service-mix similarityView profile →

Daniel T. Jones, MD

Anesthesiology · Flagstaff, AZ

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
  • Anesthesia for x-ray or radiation therapy (01922)
78%Service-mix similarityView profile →

John Sterling Marvel, D.O.

Anesthesiology · Flagstaff, AZ

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
75%Service-mix similarityView profile →

Kyle Richardson, MD

Anesthesiology · Flagstaff, AZ

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
75%Service-mix similarityView profile →

Birch Marcel Degomez, M.D.

Anesthesiology · Flagstaff, AZ

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
  • Anesthesia for x-ray or radiation therapy (01922)
74%Service-mix similarityView profile →

Kirk Justin Richardson, MD

Anesthesiology · Flagstaff, AZ

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
  • Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) (64415)
73%Service-mix similarityView profile →

Gregory S. Milios, D.O.

Anesthesiology · Flagstaff, AZ

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) (64415)
62%Service-mix similarityView profile →

Jeremy Nielsen, M.D.

Anesthesiology · Flagstaff, AZ

Shared published services
3 shared services · view billing descriptions
  • Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
  • Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) (64415)
48%Service-mix similarityView profile →

Mark Chandler Lindstrom, DO

Anesthesiology · Flagstaff, AZ

Shared published services
1 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
45%Service-mix similarityView profile →

Kellie Lynn Arviso, M.D.

Anesthesiology · Flagstaff, AZ

Shared published services
1 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
45%Service-mix similarityView profile →

Mark King Chapman, MD

Anesthesiology · Flagstaff, AZ

Shared published services
2 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
41%Service-mix similarityView profile →

Nicholas Vincent Franceschini, MD

Anesthesiology · Flagstaff, AZ

Shared published services
3 shared services · view billing descriptions
  • Anesthesia for extensive surgery on spine (00670)
  • Anesthesia for x-ray or radiation therapy (01922)
  • Insertion of artery tube for blood sampling or infusion through skin (36620)
41%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.