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Compare the published Medicare service mix of Erik Olson, PA-C with clinicians in the same registry specialty: Physician Assistant.

WORCESTER, MA · Exact areaEdit location

2024 published service data · 225 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Kathleen Ann Ribezzo, PA-C

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
100%Service-mix similarityView profile →

Vanessa I. Vilas

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
99%Service-mix similarityView profile →

Duncan R. Daviau, PA-C

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
98%Service-mix similarityView profile →

Nicholas Winters, PA-C

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
98%Service-mix similarityView profile →

Alison Marie Gagnon

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
98%Service-mix similarityView profile →

James R. Grogan, PA-C

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
93%Service-mix similarityView profile →

Eric M. Otterson, PA-C

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
89%Service-mix similarityView profile →

Morgan John Conwell, PA-C

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
88%Service-mix similarityView profile →

Allyson Marie Martin

Physician Assistant · Worcester, MA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
86%Service-mix similarityView profile →

Molly J. Hageman, PA-C

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
82%Service-mix similarityView profile →

Ian E. Dziewietin, PA-C

Physician Assistant · Worcester, MA

Shared published services
3 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with low level of medical decision making (99283)
82%Service-mix similarityView profile →

Ryan Mullen, PA

Physician Assistant · Worcester, MA

Shared published services
2 shared services · view billing descriptions
  • Emergency department visit with moderate level of medical decision making (99284)
  • Emergency department visit with low level of medical decision making (99283)
79%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.