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Compare the published Medicare service mix of Kevin Anthony O'toole, MD with clinicians in the same registry specialty: Emergency Medicine (CMS).

HARTFORD, CT · 100 milesEdit location
Within 100 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 15 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Adam J Berman, M.D.

Emergency Medicine (CMS) · New Hyde Park, NY

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
95%Service-mix similarity~88.9 milesView profile →

Rama Bhaskara Rao, M.D.

Emergency Medicine (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
93%Service-mix similarity~96.2 milesView profile →

Vincent Lee, M.D.

Emergency Medicine (CMS) · Valley Stream, NY

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
90%Service-mix similarity~92.7 milesView profile →

Derek A Barclay, M.D.

Specialty details in registry · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
90%Service-mix similarity~91.1 milesView profile →

Susi Vassallo, M.D.

Emergency Medicine · Medical Toxicology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
89%Service-mix similarity~97.7 milesView profile →

Daniel Gyasi Lev Herbert-Cohen, M.D.

Specialty details in registry · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
89%Service-mix similarity~97.7 milesView profile →

Emily Taub Cohen, MD

Emergency Medicine (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
77%Service-mix similarity~97.7 milesView profile →

Katherine Brady Tang, MD

Emergency Medicine (CMS) · Boston, MA

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)
75%Service-mix similarity~90.7 milesView profile →

Michael Joseph Burns, M.D.

Specialty details in registry · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
74%Service-mix similarity~90.7 milesView profile →

Rachel Shively, M.D.

Emergency Medicine (CMS) · Manhasset, NY

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)
74%Service-mix similarity~85.5 milesView profile →

Arie Pearce Francis

Specialty details in registry · Stony Brook, NY

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergency department visit with high level of medical decision making (99285)
  • Emergency department visit with moderate level of medical decision making (99284)
72%Service-mix similarity~63.4 milesView profile →

Dean Olsen, DO

Emergency Medicine (CMS) · Bronx, NY

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)
67%Service-mix similarity~89.7 milesView 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 approximate distance 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.