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Colon & Rectal Surgery in Los Angeles, California

Data updated monthly · Last refresh September 2026

19 Colon & Rectal Surgery providers practice in Los Angeles. Listings are drawn from federal public records and are not endorsements.

Colon & Rectal Surgery providers in Los Angeles

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Adil Farooqui, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Adrian Ortega, M.D.
Los Angeles, CA · $42 in drug and device payments (2025) · (323) 865-3668
Dr. Alessio Pigazzi, M.D.
Los Angeles, CA · $1,008 in drug and device payments (2025) · Telehealth · (310) 423-5874
Dr. Anne Lin, MD
Los Angeles, CA · $130 in drug and device payments (2025) · Telehealth · (310) 794-7788
Dr. Bobby Harris, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 736-7605
Dr. Christine Hsieh, M.D.
Los Angeles, CA · $4,927 in drug and device payments (2025) · Telehealth · (323) 865-3690
Dr. Clifford Ko, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-9425
Dr. David Rosenfeld, MD
Los Angeles, CA · $34 in drug and device payments (2025) · (310) 854-3580
Dr. Glenn Ault, M.D.
Los Angeles, CA · $2,345 in drug and device payments (2025) · (323) 865-3690
Dr. Jc Chen, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (800) 872-2273
Dr. Joongho Shin, MD
Los Angeles, CA · $2,807 in drug and device payments (2025) · Telehealth · (323) 865-3690
Dr. Kevork Kazanjian, M.D.
Los Angeles, CA · $4,658 in drug and device payments (2025) · Telehealth · (310) 206-0585
Dr. Kyle Cologne, M.D.
Los Angeles, CA · $218 in drug and device payments (2025) · Telehealth · (323) 865-3690
Dr. Marcia Russell, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-6078
Dr. Marjun Duldulao, M.D.
Los Angeles, CA · $3,097 in drug and device payments (2025) · Telehealth · (323) 865-3690
Dr. Mary Kwaan, M.D., M.P.H.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 794-7788
Dr. Sang Lee, M.D.
Los Angeles, CA · $2,296,585 in drug and device payments (2025) · Telehealth · (323) 865-3690
Dr. Sarah Choi, M.D.
Los Angeles, CA · $1,065 in drug and device payments (2025) · (323) 442-8500
Dr. Sarah Koller, M.D.
Los Angeles, CA · $357 in drug and device payments (2025) · (323) 865-3690

Common questions

How many Colon & Rectal Surgery providers are in Los Angeles, California?

There are 19 Colon & Rectal Surgery providers with active NPI records practicing in Los Angeles, according to federal NPPES data refreshed monthly.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in Los Angeles Colon & Rectal Surgery across California

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.