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Compare the published Medicare service mix of Zacharia El-Samin, P.A.C with clinicians in the same registry specialty: Physician Assistant (CMS).

CT · Exact areaEdit location

2024 published service data · 500 eligible profiles compared. This search reached its 500-profile comparison limit, using NPI order. Narrow the location for a more focused comparison. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Astrid B Garza Posadas, PHYSICIAN ASSISTANT

Specialty details in registry · Derby, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
100%Service-mix similarityView profile →

Brendan T. Leahy, PA-C

Physician Assistant (CMS) · Hartford, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
100%Service-mix similarityView profile →

Erin Kelly Flynn, PA-C

Physician Assistant (CMS) · New Haven, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
100%Service-mix similarityView profile →

Colin Mcnamara, PA-C

Specialty details in registry · New Haven, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
100%Service-mix similarityView profile →

Matthew Rodziewicz, PA-C

Physician Assistant (CMS) · Hartford, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
100%Service-mix similarityView profile →

Connor Doherty, PA-C

Physician Assistant (CMS) · Hartford, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
99%Service-mix similarityView profile →

Crystal Rose, PA

Physician Assistant (CMS) · Hartford, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
99%Service-mix similarityView profile →

Matthew Walter Ryan, PA-C

Physician Assistant (CMS) · Hartford, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
99%Service-mix similarityView profile →

Tyler John Broome, PA-C

Specialty details in registry · New Haven, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
98%Service-mix similarityView profile →

Zachary Richard Lavender, PA-C

Physician Assistant (CMS) · Hartford, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
98%Service-mix similarityView profile →

Samantha Guleserian, PA-C

Physician Assistant (CMS) · Branford, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
98%Service-mix similarityView profile →

David Leonard, PA

Specialty details in registry · New Haven, CT

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
98%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.