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Compare the published Medicare service mix of Tracy Williams Sax, MD with clinicians in the same registry specialty: Neurology.

PORTLAND, OR · Exact areaEdit location

2024 published service data · 87 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Herbert A Krob, MD

Neurology · Portland, OR

Shared published services
1 shared services · view billing descriptions
  • Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face (64615)
39%Service-mix similarityView profile →

Deborah Ruth Syna, M.D.

Neurology · Portland, OR

Shared published services
1 shared services · view billing descriptions
  • Needle measurement of electrical activity in arm or leg muscles, complete study (95886)
38%Service-mix similarityView profile →

Yaowaree Leavell, MD

Neurology · Portland, OR

Shared published services
2 shared services · view billing descriptions
  • Needle measurement of electrical activity in arm or leg muscles, limited study (95885)
  • Needle measurement of electrical activity in arm or leg muscles, complete study (95886)
36%Service-mix similarityView profile →

Anson Wilks, M.D.

Neurology · Portland, OR

Shared published services
2 shared services · view billing descriptions
  • Needle measurement of electrical activity in arm or leg muscles, limited study (95885)
  • Needle measurement of electrical activity in arm or leg muscles, complete study (95886)
36%Service-mix similarityView profile →

Juliette Sophie Preston, MD

Neurology · Portland, OR

Shared published services
1 shared services · view billing descriptions
  • Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face (64615)
35%Service-mix similarityView profile →

Nizar Chahin, M.D.

Neurology · Portland, OR

Shared published services
2 shared services · view billing descriptions
  • Needle measurement of electrical activity in arm or leg muscles, limited study (95885)
  • Needle measurement of electrical activity in arm or leg muscles, complete study (95886)
35%Service-mix similarityView profile →

Farzaneh Khezri, M.D.

Neurology · Portland, OR

Shared published services
1 shared services · view billing descriptions
  • Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face (64615)
34%Service-mix similarityView profile →

Ghazaleh Jafari, MD

Neurology · Portland, OR

Shared published services
2 shared services · view billing descriptions
  • Needle measurement of electrical activity in arm or leg muscles, limited study (95885)
  • Needle measurement of electrical activity in arm or leg muscles, complete study (95886)
33%Service-mix similarityView profile →

Brooke M Madden, M.D.

Neurology · Portland, OR

Shared published services
1 shared services · view billing descriptions
  • Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face (64615)
31%Service-mix similarityView profile →

Chafic Karam, M.D.

Neurology · Portland, OR

Shared published services
2 shared services · view billing descriptions
  • Needle measurement of electrical activity in arm or leg muscles, limited study (95885)
  • Needle measurement of electrical activity in arm or leg muscles, complete study (95886)
30%Service-mix similarityView profile →

Kimberly Hutchison, MD

Neurology · Portland, OR

Shared published services
1 shared services · view billing descriptions
  • Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face (64615)
28%Service-mix similarityView profile →

Elise Anderson, MD

Neurology · Portland, OR

Shared published services
1 shared services · view billing descriptions
  • Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face (64615)
27%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.