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Compare the published Medicare service mix of Timothy Mark Biagini, M.D. with clinicians in the same registry specialty: Gastroenterology (CMS).

IL · Exact areaEdit location

2024 published service data · 121 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Charles Berkelhammer, MD

Gastroenterology (CMS) · Oak Lawn, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Biopsy of large bowel using a flexible endoscope (45380)
65%Service-mix similarityView profile →

Douglas A Lee, MD

Gastroenterology (CMS) · Oak Lawn, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Biopsy of large bowel using a flexible endoscope (45380)
55%Service-mix similarityView profile →

Mihir Majmundar, M.D.

Gastroenterology (CMS) · Oak Lawn, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Biopsy of large bowel using a flexible endoscope (45380)
54%Service-mix similarityView profile →

Gloria Jean Caruso, M.D.

Gastroenterology (CMS) · Bloomingdale, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Biopsy of large bowel using a flexible endoscope (45380)
52%Service-mix similarityView profile →

Slawomir Marecik, MD

Colorectal Surgery (Proctology) (CMS) · Park Ridge, IL

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Diagnostic exam of large bowel using a flexible endoscope (45378)
33%Service-mix similarityView profile →

Peter C Rantis, M.D.

Colorectal Surgery (Proctology) · General Surgery (CMS) · Hoffman Estates, IL

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
28%Service-mix similarityView profile →

Paul J Guske, M.D.

General Surgery (CMS) · Hoffman Estates, IL

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
26%Service-mix similarityView profile →

Barry M. Summers, M.D.

General Surgery · Peripheral Vascular Disease (CMS) · Chicago, IL

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
18%Service-mix similarityView profile →

Elizabeth A Schupp, MD, FCCP

Critical Care (Intensivists) · Pulmonary Disease (CMS) · South Barrington, IL

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
10%Service-mix similarityView profile →

Nitin Nadkarni, M.D.

Neurology (CMS) · Crest Hill, IL

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
10%Service-mix similarityView profile →

Darin O'connor Harnisch, M.D.

Infectious Disease (CMS) · Niles, IL

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
9%Service-mix similarityView profile →

Walid Khayr, MD

Infectious Disease (CMS) · North Chicago, IL

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
9%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.