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Compare the published Medicare service mix of Tammy Mai, D.O. with clinicians in the same registry specialty: Anesthesiology.

PORTLAND, OR · Exact areaEdit location

2024 published service data · 228 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Elliot Harmon, MD

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Anesthesia for x-ray on artery of brain, heart, or chest (01926)
  • Ultrasound of heart blood flow, valves and chambers (93320)
71%Service-mix similarityView profile →

Stephen C Holmes, MD

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Ultrasound of heart blood flow, valves and chambers (93320)
  • Ultrasound of heart with color-depicted blood flow, rate and valve function (93325)
70%Service-mix similarityView profile →

Vivian Meiwah Choi

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Anesthesia for x-ray on artery of brain, heart, or chest (01926)
  • Ultrasound of heart blood flow, valves and chambers (93320)
69%Service-mix similarityView profile →

Warren Spitz, MD

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Anesthesia for x-ray on artery of brain, heart, or chest (01926)
  • Ultrasound of heart blood flow, valves and chambers (93320)
69%Service-mix similarityView profile →

Darin E Brandt, DO

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Anesthesia for x-ray on artery of brain, heart, or chest (01926)
  • Ultrasound of heart blood flow, valves and chambers (93320)
66%Service-mix similarityView profile →

Jan-Pablo Georg Lewis Kollmar, MD

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Ultrasound of heart blood flow, valves and chambers (93320)
  • Ultrasound of heart with color-depicted blood flow, rate and valve function (93325)
61%Service-mix similarityView profile →

Jordan Chiarchiaro, M.D.

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Anesthesia for x-ray on artery of brain, heart, or chest (01926)
  • Ultrasound of heart blood flow, valves and chambers (93320)
61%Service-mix similarityView profile →

Brian David Tompkins, MD

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Ultrasound of heart blood flow, valves and chambers (93320)
  • Ultrasound of heart with color-depicted blood flow, rate and valve function (93325)
58%Service-mix similarityView profile →

James Sun Demeester, M.D.

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Ultrasound of heart blood flow, valves and chambers (93320)
  • Ultrasound of heart with color-depicted blood flow, rate and valve function (93325)
56%Service-mix similarityView profile →

Elissa Chen Pirocanac, MD

Anesthesiology · Portland, OR

Shared published services
3 shared services · view billing descriptions
  • Ultrasound of heart with probe in esophagus, with report (93312)
  • Ultrasound of heart blood flow, valves and chambers (93320)
  • Ultrasound of heart with color-depicted blood flow, rate and valve function (93325)
54%Service-mix similarityView profile →

Asish K. Das, MD

Anesthesiology · Portland, OR

Shared published services
2 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)
50%Service-mix similarityView profile →

Nikki B Jaworski, M.D.

Anesthesiology · Portland, OR

Shared published services
1 shared services · view billing descriptions
  • Anesthesia for x-ray on artery of brain, heart, or chest (01926)
46%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.