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Compare the published Medicare service mix of Erin Elizabeth O'brien, PA-C with clinicians in the same registry specialty: Physician Assistant.

BAY SHORE, NY · Exact areaEdit location

2024 published service data · 40 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Corey Dallas Prezzano, PA-C

Physician Assistant · Bay Shore, NY

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
100%Service-mix similarityView profile →

Sabrina Jaramillo, PA

Physician Assistant · Bay Shore, NY

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
80%Service-mix similarityView profile →

Julia R Sangiorgio

Physician Assistant · Bay Shore, NY

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
67%Service-mix similarityView profile →

Kristen Findlay, PA-C

Physician Assistant · Bay Shore, NY

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
67%Service-mix similarityView profile →

Ruth Lloret, RPA-C

Physician Assistant · Bay Shore, NY

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
67%Service-mix similarityView profile →

Alexandra N Cardinal, PHYSICIAN ASSISTANT

Physician Assistant · Bay Shore, NY

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
66%Service-mix similarityView profile →

Trevor Mark Ambrico

Physician Assistant · Bay Shore, NY

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
66%Service-mix similarityView profile →

Valerie Brooke Pace, PA-C

Physician Assistant · Bay Shore, NY

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
61%Service-mix similarityView profile →

Brian Gerlach

Physician Assistant · Bay Shore, NY

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
57%Service-mix similarityView profile →

Amanda Rainey, PA-C

Physician Assistant · Bay Shore, NY

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
51%Service-mix similarityView profile →

Deborah Crossman, PA

Physician Assistant · Bay Shore, NY

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
41%Service-mix similarityView profile →

Hanan Soliman-Lee, PA

Physician Assistant · Bay Shore, NY

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
34%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.