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Compare the published Medicare service mix of Mark Stark, MD with clinicians in the same registry specialty: Specialty details in registry.

JACKSONVILLE, FL · Exact areaEdit location

2024 published service data · 85 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Bhaumik Brahmbhatt, MBBS

Gastroenterology (CMS) · Jacksonville, FL

Shared published services
2 shared services · view billing descriptions
  • Imaging of digestive tract done from the inside of the digestive tract (91110)
  • Other procedure on small bowel (44799)
51%Service-mix similarityView profile →

Frank Lukens, MD

Gastroenterology (CMS) · Jacksonville, FL

Shared published services
2 shared services · view billing descriptions
  • Imaging of digestive tract done from the inside of the digestive tract (91110)
  • Other procedure on small bowel (44799)
29%Service-mix similarityView profile →

Lindsey Anne Russell, MD

Gastroenterology (CMS) · Jacksonville, FL

Shared published services
1 shared services · view billing descriptions
  • Imaging of digestive tract done from the inside of the digestive tract (91110)
22%Service-mix similarityView profile →

Rehan Mohammed Naseemuddin, M.D.

Gastroenterology · Internal Medicine (CMS) · Jacksonville, FL

Shared published services
1 shared services · view billing descriptions
  • Imaging of digestive tract done from the inside of the digestive tract (91110)
13%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.