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Compare the published Medicare service mix of Christopher Paiji, MD with clinicians in the same registry specialty: Gastroenterology (CMS).

ORANGE, CA · Exact areaEdit location

2024 published service data · 32 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Usman G Rahim, M.D.

Gastroenterology (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Review by radiologist of image from tube placement into bile duct using an endoscope (74328)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43259)
44%Service-mix similarityView profile →

Alexander W. Jahng, M.D.

Gastroenterology (CMS) · Orange, CA

Shared published services
1 shared services · view billing descriptions
  • Review by radiologist of image from tube placement into bile duct using an endoscope (74328)
43%Service-mix similarityView profile →

Jason Buddika Samarasena, M.D.

Gastroenterology · Internal Medicine (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43259)
31%Service-mix similarityView profile →

John Gunn Lee, MD

Gastroenterology · Internal Medicine (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43259)
30%Service-mix similarityView profile →

Piotr Szczepan Sowa, M.D.

Gastroenterology (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43259)
23%Service-mix similarityView profile →

David P Lee, M.D. M.P.H.

Gastroenterology · Internal Medicine (CMS) · Orange, CA

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)
23%Service-mix similarityView profile →

Ousama Alkhatib, MD

Gastroenterology · Internal Medicine (CMS) · Orange, CA

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)
21%Service-mix similarityView profile →

Hardeep M Singh, M.D.

Gastroenterology · Internal Medicine (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
  • Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43259)
20%Service-mix similarityView profile →

Shravani Reddy, M.D

Gastroenterology (CMS) · Orange, CA

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 →

George Holman, MD

Gastroenterology (CMS) · Orange, CA

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)
17%Service-mix similarityView profile →

Christina Ling, M.D.

Gastroenterology (CMS) · Orange, CA

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)
17%Service-mix similarityView profile →

C Gregory Albers, MD

Gastroenterology · Internal Medicine (CMS) · Orange, CA

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)
17%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.