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Compare the published Medicare service mix of James K Piper, M.D. with clinicians in the same registry specialty: Gastroenterology (CMS).

BOSTON, MA · Exact areaEdit location

2024 published service data · 169 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Irena Maier, M.D.

Gastroenterology · Internal Medicine (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
71%Service-mix similarityView profile →

James C Chou, MD

Gastroenterology (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
63%Service-mix similarityView profile →

Charles T. Buzanis, MD

Gastroenterology (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
53%Service-mix similarityView profile →

Aurada Cholapranee, M.D.

Gastroenterology (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
53%Service-mix similarityView profile →

Lori Beth Olans, MD

Gastroenterology · Internal Medicine (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
51%Service-mix similarityView profile →

Steven J. Shields, MD

Gastroenterology (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
45%Service-mix similarityView profile →

Anne Liu, M.D.

Gastroenterology (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
43%Service-mix similarityView profile →

Douglas Alan Horst, MD

Gastroenterology · Internal Medicine (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
42%Service-mix similarityView profile →

Aaron Dickstein, M.D.

Gastroenterology · Internal Medicine (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
41%Service-mix similarityView profile →

Alison Goldin, M.D.

Gastroenterology · Internal Medicine (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
38%Service-mix similarityView profile →

Jennifer Nayor, M.D.

Gastroenterology (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
38%Service-mix similarityView profile →

Catherine Petruff Cheney, M.D.

Gastroenterology · Internal Medicine (CMS) · Boston, MA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
37%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.