Colorectal Surgeons in California
Data updated monthly · Last refresh October 2026
200 Colon & Rectal Surgery providers practice in California, including 73 (37%) offering telehealth. The largest concentration is in Los Angeles. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
200providers
73telehealth
Los Angelestop city
Colon & Rectal Surgery by city in California
Choose a city to see providers there.
Colon & Rectal Surgery providers in California
Listed by city, largest first. 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. Robert Beart, M.D.Glendale, CA · $70 in drug and device payments (2025) ·
(818) 244-8161 Dr. Kurt Melstrom, MDGlendora, CA · No drug or device payments recorded (2025) · Telehealth ·
(626) 914-3921 Dr. Noor Azimi, MDGreenbrae, CA · No drug or device payments recorded (2025) ·
(415) 461-3300 Dr. Nana Pianim, MDHarbor City, CA · No drug or device payments recorded (2025) ·
(424) 328-2647 Dr. Ahmed Alkoraishi, MDHayward, CA · No drug or device payments recorded (2025) ·
(510) 784-4000 Dr. Theodore Coutsoftides, MDHuntington Beach, CA · No drug or device payments recorded (2025) ·
(714) 336-7949 Dr. Carlos Esparza MonzaviIrvine, CA · $584 in drug and device payments (2025) · Telehealth ·
(800) 826-4673 Dr. Elizabeth Arcila, M.D.Irvine, CA · No drug or device payments recorded (2025) ·
(949) 791-6767 Dr. Matthew Sherman, M.D. Dr. Siamak Milanchi, M.D.Irvine, CA · No drug or device payments recorded (2025) · Telehealth ·
(949) 429-0268 Dr. Sonny Wang, M.D.Irvine, CA · No drug or device payments recorded (2025) ·
(949) 387-7240 Dr. Ziyad Jabaji, M.D.Irvine, CA · $455 in drug and device payments (2025) · Telehealth ·
(949) 557-0370 Dr. Robert Belt, MDLaguna Beach, CA · No drug or device payments recorded (2025) ·
(949) 499-4950 Dr. Gene Syn, M.D.Laguna Hills, CA · $109 in drug and device payments (2025) ·
(949) 609-0500 Dr. Elisabeth Mclemore, M.D.La Jolla, CA · $587 in drug and device payments (2025) ·
(858) 822-6100 Dr. Keith Beiermeister, M.D.La Jolla, CA · $738 in drug and device payments (2025) · Telehealth ·
(858) 558-2272 Dr. Lynn Weston, MDLa Jolla, CA · $4,428 in drug and device payments (2025) ·
(858) 554-8984 Dr. Michael Worsey, MDLa Jolla, CA · $38 in drug and device payments (2025) · Telehealth ·
(858) 558-2272 Dr. Robert Brookover, MDLa Jolla, CA · $489 in drug and device payments (2025) · Telehealth ·
(858) 554-8984 Dr. Diana Davio, M.D.Lancaster, CA · No drug or device payments recorded (2025) ·
(661) 723-2866 Dr. Lisa ParkLarkspur, CA · $249 in drug and device payments (2025) · Telehealth ·
(415) 924-2515 Dr. Allison Aka, MDLoma Linda, CA · $589 in drug and device payments (2025) · Telehealth ·
(909) 651-5948 Dr. David Row, M.D.Loma Linda, CA · $147 in drug and device payments (2025) ·
(909) 558-2822 Dr. John Griffin, M.D.Loma Linda, CA · $805 in drug and device payments (2025) ·
(909) 558-2822 Dr. Justin Greco, MB BCH BAOLoma Linda, CA · $1,795 in drug and device payments (2025) · Telehealth ·
(909) 651-1000 Dr. Sarath Sujatha-bhaskarLong Beach, CA · $986 in drug and device payments (2025) ·
(562) 826-8000 Dr. Steven Mills, MDLong Beach, CA · No drug or device payments recorded (2025) · Telehealth ·
(562) 826-8000 Dr. Imad Shbeeb, MDLos Alamitos, CA · No drug or device payments recorded (2025) ·
(562) 596-7700 Dr. Adil Farooqui, MDLos 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, MDLos Angeles, CA · $130 in drug and device payments (2025) · Telehealth ·
(310) 794-7788 Dr. Bobby Harris, MDLos 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, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 825-9425 Dr. David Rosenfeld, MDLos 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, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(800) 872-2273 Dr. Joongho Shin, MDLos 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, MDLos 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 Dr. Kristina Hobson, M.D.Los Gatos, CA · $48 in drug and device payments (2025) · Telehealth ·
(408) 358-2868 Dr. Mark Segall, M.D.Los Gatos, CA · No drug or device payments recorded (2025) ·
(408) 358-3500 Common questions
How many Colon & Rectal Surgery providers are in California?There are 200 Colon & Rectal Surgery providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Colon & Rectal Surgery providers in California offer telehealth?Yes. 73 of the 200 Colon & Rectal Surgery providers in California (about 37%) report offering telehealth services in CMS data.
Which cities in California have the most Colon & Rectal Surgery providers?Los Angeles (19), Sacramento (12), Fresno (10) have the highest concentration of Colon & Rectal Surgery providers in California.
How many Colon & Rectal Surgery providers in California received drug or device company payments?126 of 200 Colon & Rectal Surgery providers in California (63%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Where does this data come from?Provider counts and profiles 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.
Do most Colorectal Surgeons in California work in independent practices or large health systems?Among 142 Colorectal Surgeons in California enrolled in Medicare, 24% bill through a solo or small practice with fewer than 10 clinicians, 5% through a mid-size group of 10 to 99, and 71% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Colorectal Surgeons in California work at?According to CMS facility affiliation records, the California hospitals where the most Colorectal Surgeons hold privileges are Hoag Memorial Hospital Presbyterian in Newport Beach; Uci Health-Orange in Orange; Keck Hospital of Usc in Los Angeles.
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