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Compare the published Medicare service mix of Sarah Choi, M.D. with clinicians in the same registry specialty: Colorectal Surgery (Proctology) · General Surgery (CMS).

LOS ANGELES, CA · Exact areaEdit location

2024 published service data · 11 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Sang Won Lee, M.D.

Colorectal Surgery (Proctology) · General Surgery · Surgical Oncology (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • 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)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
77%Service-mix similarityView profile →

Christine Hsieh, M.D.

Colorectal Surgery (Proctology) (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
76%Service-mix similarityView profile →

Marjun Philip Narciso Duldulao, M.D.

Colorectal Surgery (Proctology) · General Surgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
74%Service-mix similarityView profile →

Kyle G Cologne, M.D.

Colorectal Surgery (Proctology) · General Practice (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • 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)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
73%Service-mix similarityView profile →

Marcia Mcgory Russell, MD

Colorectal Surgery (Proctology) · General Surgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Diagnostic exam of anus using an endoscope (46600)
63%Service-mix similarityView profile →

Alessio Pigazzi, M.D.

Colorectal Surgery (Proctology) (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Diagnostic exam of anus using an endoscope (46600)
59%Service-mix similarityView profile →

Mary R Kwaan, M.D., M.P.H.

Colorectal Surgery (Proctology) · General Surgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Diagnostic exam of anus using an endoscope (46600)
55%Service-mix similarityView profile →

Kevork Kazanjian, M.D.

Colorectal Surgery (Proctology) · General Surgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Diagnostic exam of anus using an endoscope (46600)
48%Service-mix similarityView profile →

Joongho Shin, MD

Colorectal Surgery (Proctology) · General Surgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
46%Service-mix similarityView profile →

Anne Yi-Jiun Lin, MD

Colorectal Surgery (Proctology) · General Surgery (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Diagnostic exam of anus using an endoscope (46600)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
42%Service-mix similarityView profile →

Phillip Robert Fleshner, MD

Colorectal Surgery (Proctology) (CMS) · Los Angeles, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk (G0121)
25%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.