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Compare the published Medicare service mix of Christopher Ko, M.D. with clinicians in the same registry specialty: Gastroenterology · Internal Medicine (CMS).

ANN ARBOR, MI · Exact areaEdit location

2024 published service data · 65 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Erik Wamsteker, MD

Gastroenterology · Internal Medicine (CMS) · Ann Arbor, MI

Shared published services
3 shared services · view billing descriptions
  • Review by radiologist of image from tube placement into bile duct using an endoscope (74328)
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Replacement of stent in pancreatic or bile duct using a flexible endoscope (43276)
69%Service-mix similarityView profile →

Ngoc-Duyen Thi Dang, MD

Gastroenterology · Internal Medicine (CMS) · Ann Arbor, MI

Shared published services
3 shared services · view billing descriptions
  • Review by radiologist of image from tube placement into bile duct using an endoscope (74328)
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Replacement of stent in pancreatic or bile duct using a flexible endoscope (43276)
65%Service-mix similarityView profile →

Richard S Kwon, MD

Gastroenterology · Internal Medicine (CMS) · Ann Arbor, MI

Shared published services
3 shared services · view billing descriptions
  • Review by radiologist of image from tube placement into bile duct using an endoscope (74328)
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Replacement of stent in pancreatic or bile duct using a flexible endoscope (43276)
65%Service-mix similarityView profile →

George M Philips, M.D.

Gastroenterology (CMS) · Ann Arbor, MI

Shared published services
3 shared services · view billing descriptions
  • Review by radiologist of image from tube placement into bile duct using an endoscope (74328)
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Ultrasound guided needle aspiration or biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43242)
60%Service-mix similarityView profile →

Allison Raye Schulman, M.D.

Gastroenterology · Internal Medicine (CMS) · Ann Arbor, MI

Shared published services
3 shared services · view billing descriptions
  • Review by radiologist of image from tube placement into bile duct using an endoscope (74328)
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Replacement of stent in pancreatic or bile duct using a flexible endoscope (43276)
59%Service-mix similarityView profile →

Jorge David Machicado Rivero, MD

Gastroenterology (CMS) · Ann Arbor, MI

Shared published services
3 shared services · view billing descriptions
  • Review by radiologist of image from tube placement into bile duct using an endoscope (74328)
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Replacement of stent in pancreatic or bile duct using a flexible endoscope (43276)
58%Service-mix similarityView profile →

Cyrus Ramin Piraka, MD

Gastroenterology · Internal Medicine (CMS) · Ann Arbor, MI

Shared published services
3 shared services · view billing descriptions
  • Review by radiologist of image from tube placement into bile duct using an endoscope (74328)
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Ultrasound guided needle aspiration or biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43242)
57%Service-mix similarityView profile →

Gregory Piech, M.D., M.P.H.

Gastroenterology (CMS) · Ann Arbor, MI

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)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
36%Service-mix similarityView profile →

Arjun Raj Sondhi, MD

Gastroenterology (CMS) · Ann Arbor, MI

Shared published services
3 shared services · view billing descriptions
  • Removal of stone or debris from bile or pancreatic duct using a flexible endoscope (43264)
  • Insertion of stent into pancreatic or bile duct using a flexible endoscope (43274)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
35%Service-mix similarityView profile →

Abhishek Satishchandran, MD

Gastroenterology · Internal Medicine (CMS) · Ann Arbor, MI

Shared published services
2 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
33%Service-mix similarityView profile →

Jessica Jou, MD

Gastroenterology (CMS) · Ann Arbor, MI

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)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
33%Service-mix similarityView profile →

Stacy Bartnik Menees, MD

Gastroenterology · Internal Medicine (CMS) · Ann Arbor, MI

Shared published services
2 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
30%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.