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Compare the published Medicare service mix of Eileen Yuan Chang with clinicians in the same registry specialty: Emergency Medicine.

TORRANCE, CA · Exact areaEdit location

2024 published service data · 118 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Joseph Friedrich, MD

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Martin A Pitts, MD

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Kirsten Liu, M.D.

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Darren Lee Bedolla, MD

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Dana Edward Kennedy, M.D.

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Fardis Tavangary, DO

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Gina L Sulmeyer, MD

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Jenny Luo

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Monica Karmen Lee, MD

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

John Joseph Campo, MD

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Kurt Hansen

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%Service-mix similarityView profile →

Brett Wallace Lorber, MD

Emergency Medicine · Torrance, CA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Critical care, first 30-74 minutes (99291)
  • Electrocardiogram (ecg) 1 to 3 leads with review by physician only (93042)
100%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.