A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Clement Douglass Marshall, MD with clinicians in the same registry specialty: Specialty details in registry.

CT · Exact areaEdit location

2024 published service data · 87 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

John Guzzi, MD

Anesthesiology (CMS) · New Haven, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
82%Service-mix similarityView profile →

Samir Gautam, M.D., PH.D.

Critical Care (Intensivists) · Pulmonary Disease (CMS) · West Haven, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
77%Service-mix similarityView profile →

Jennifer Tsai

Emergency Medicine (CMS) · New Haven, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
54%Service-mix similarityView profile →

Eileen Harder

Specialty details in registry · New Haven, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
50%Service-mix similarityView profile →

Ryan Alexander Darnall, DO

Internal Medicine (CMS) · Farmington, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
45%Service-mix similarityView profile →

Andrew Mikhalyuk, M.D.

Emergency Medicine (CMS) · Farmington, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
44%Service-mix similarityView profile →

Syed Shayan Ali, MBBS

Emergency Medicine (CMS) · New Haven, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
39%Service-mix similarityView profile →

Matthew Babcock, M.D.

Emergency Medicine (CMS) · Hartford, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
37%Service-mix similarityView profile →

Virginia Stanley Parker, M.D.

Critical Care (Intensivists) · General Surgery (CMS) · Waterbury, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
37%Service-mix similarityView profile →

Jessica Way Lozier, MBBS

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Farmington, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
32%Service-mix similarityView profile →

Kathleen A Mcavoy, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · New Haven, CT

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
32%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.