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Compare the published Medicare service mix of Ryan S O'connor, M.D. with clinicians in the same registry specialty: Emergency Medicine.

LOS ANGELES, CA · Exact areaEdit location

2024 published service data · 382 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Darlene Janalyn Curran, MD

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Alexander Ryan Sapin, MD/MPH

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

David Fowler, MD

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Molly Grassini

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Kristi Ann Stanley Kawasaki, M.D.

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Derrick R Darnsteadt, MD

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Linda F. Adams, M.D.

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Jackson Dreher Kloor

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Kinza Ahmed

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Vanessa Palomares, MD

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Jared Marshall, MD

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
100%Service-mix similarityView profile →

Varsha Aravindabose, DO

Emergency Medicine · Los Angeles, CA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
90%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.