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Compare the published Medicare service mix of Christina Mary Pieper-Bigelow, MD with clinicians in the same registry specialty: Gastroenterology (CMS).

HASTINGS, MN · 25 milesEdit location
Within 25 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 · 73 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Krista M. Newman, M.D.

Gastroenterology (CMS) · Saint Paul, MN

Shared published services
2 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
64%Service-mix similarity~20.9 milesView profile →

Charoen Mankongpaisarnrung, M.D.

Gastroenterology (CMS) · Saint Paul, MN

Shared published services
2 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
61%Service-mix similarity~20.9 milesView profile →

Ahmad S Abdulkarim, MD

Gastroenterology · Internal Medicine (CMS) · Saint Paul, MN

Shared published services
3 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
60%Service-mix similarity~20.9 milesView profile →

Irshad H Jafri, MD

Gastroenterology (CMS) · St Paul, MN

Shared published services
2 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
57%Service-mix similarity~19.9 milesView profile →

Alexander Khoruts, MD

Gastroenterology (CMS) · Saint Paul, MN

Shared published services
2 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
57%Service-mix similarity~24.1 milesView profile →

Edward Thomas Schaefer, D.O.

Internal Medicine (CMS) · Saint Paul, MN

Shared published services
2 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
55%Service-mix similarity~20.9 milesView profile →

Martin J Gadek, MD

Gastroenterology (CMS) · Northfield, MN

Shared published services
3 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
55%Service-mix similarity~23.0 milesView profile →

Rebecca W. S. Lai Li, MD

Gastroenterology (CMS) · Saint Paul, MN

Shared published services
2 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
54%Service-mix similarity~20.9 milesView profile →

Anupama Upadhyaya Nookala, M.D.

Gastroenterology · Internal Medicine (CMS) · Saint Paul, MN

Shared published services
2 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
53%Service-mix similarity~20.9 milesView profile →

Alyssa Marie Anderson, M.D.

Gastroenterology (CMS) · Saint Paul, MN

Shared published services
2 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
51%Service-mix similarity~20.9 milesView profile →

William David Farrar, M.D.

Gastroenterology · Internal Medicine (CMS) · Red Wing, MN

Shared published services
2 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
42%Service-mix similarity~19.0 milesView profile →

Stephen James Rudolph, MD

Gastroenterology (CMS) · Saint Paul, MN

Shared published services
3 shared services · view billing descriptions
  • Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
41%Service-mix similarity~24.1 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.