Pathologists (Anatomic & Clinical) in California
Data updated monthly · Last refresh October 2026
1,553 Anatomic Pathology & Clinical Pathology providers practice in California, including 5 (0%) 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.
1,553providers
5telehealth
Los Angelestop city
Anatomic Pathology & Clinical Pathology by city in California
Choose a city to see providers there.
Anatomic Pathology & Clinical Pathology 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. Ruth ZhangSan Francisco, CA · No drug or device payments recorded (2025) ·
(415) 353-1613 Dr. Ryan Gill, M.D., PH.D.San Francisco, CA · No drug or device payments recorded (2025) ·
(415) 353-8968 Dr. Sanjay Kakar, MDSan Francisco, CA · $526 in drug and device payments (2025) ·
(415) 514-0681 Dr. Sarah Cherny, M.D.San Francisco, CA · No drug or device payments recorded (2025) ·
(415) 833-3870 Dr. Shannon Mulholland, MDSan Francisco, CA · No drug or device payments recorded (2025) ·
(415) 750-5750 Dr. Shuling Zheng, MD, PHDSan Francisco, CA · No drug or device payments recorded (2025) ·
(415) 221-4810 Dr. Stephen CookSan Francisco, CA · No drug or device payments recorded (2025) ·
(154) 221-4810 Dr. Stephen Nishimura, MDSan Francisco, CA · No drug or device payments recorded (2025) ·
(415) 353-1633 Dr. Theodore Kurtz, M.D.San Francisco, CA · No drug or device payments recorded (2025) ·
(415) 353-1979 Dr. Thuy Nguyen, M.D.San Francisco, CA · $103 in drug and device payments (2025) ·
(415) 353-7359 Dr. Timothy GilpatrickSan Francisco, CA · No drug or device payments recorded (2025) ·
(415) 353-7043 Dr. Vivian TanSan Francisco, CA · No drug or device payments recorded (2025) ·
(415) 476-0789 Dr. William Karlon, M.D.San Francisco, CA · No drug or device payments recorded (2025) ·
(415) 353-4721 Dr. Yunn-yi Chen, MDSan Francisco, CA · $3,326 in drug and device payments (2025) ·
(415) 353-1102 Dr. Zane Amenhotep, M.D.San Francisco, CA · No drug or device payments recorded (2025) ·
(415) 206-8000 Dr. Armine Baltayan, MDSan Gabriel, CA · $24 in drug and device payments (2025) ·
(626) 914-3002 Dr. Arthur Williams, MDSan Gabriel, CA · No drug or device payments recorded (2025) ·
(626) 570-6597 Dr. Hong Li, MDSan Gabriel, CA · $20 in drug and device payments (2025) ·
(626) 570-6597 Dr. Mona Yong, MDSan Gabriel, CA · $110 in drug and device payments (2025) ·
(626) 570-6597 Dr. Muh-yau Tang, MDSan Gabriel, CA · No drug or device payments recorded (2025) ·
(626) 570-6597 Dr. Shirley Tan, MDSan Gabriel, CA · $20 in drug and device payments (2025) ·
(626) 570-6597 Dr. Sunita Vempati, MDSan Gabriel, CA · No drug or device payments recorded (2025) ·
(626) 570-6597 Dr. Xiangdong Bu, MDSan Gabriel, CA · No drug or device payments recorded (2025) ·
(626) 570-6597 Dr. Yibin Zhang, MDSan Gabriel, CA · No drug or device payments recorded (2025) ·
(626) 570-6597 Dr. Christine Louie, MDSan Jose, CA · No drug or device payments recorded (2025) ·
(408) 259-5000 Dr. Dawn Darbonne, MDSan Jose, CA · No drug or device payments recorded (2025) ·
(408) 885-5000 Dr. Elisabeth Mailhot, MDSan Jose, CA · No drug or device payments recorded (2025) ·
(408) 885-6550 Dr. Gerald Weiss, M.D.San Jose, CA · No drug or device payments recorded (2025) ·
(408) 866-4060 Dr. Jiajie LuSan Jose, CA · No drug or device payments recorded (2025) ·
(408) 885-5000 Dr. Larry Matsumoto, M.D.San Jose, CA · No drug or device payments recorded (2025) ·
(408) 947-2501 Dr. Raymond Azzi, MDSan Jose, CA · No drug or device payments recorded (2025) ·
(408) 885-6552 Dr. Robert Atienza, MDSan Jose, CA · No drug or device payments recorded (2025) ·
(408) 972-7454 Dr. Yan HuangSan Jose, CA · No drug or device payments recorded (2025) ·
(408) 466-3622 Dr. Zheng MaSan Jose, CA · No drug or device payments recorded (2025) ·
(412) 877-9205 Dr. Clayton Kibler, MD, MMSSan Juan Capistrano, CA · No drug or device payments recorded (2025) ·
(800) 642-4657 Dr. Eric Loo, M.D.San Juan Capistrano, CA · No drug or device payments recorded (2025) ·
(949) 728-4155 Dr. Kathleen Lynch, M.D.San Juan Capistrano, CA · No drug or device payments recorded (2025) ·
(949) 728-4325 Dr. Mohammad Sheikholeslami, M.D.San Juan Capistrano, CA · No drug or device payments recorded (2025) ·
(949) 728-4841 Dr. Sugganth Daniel, MDSan Juan Capistrano, CA · No drug or device payments recorded (2025) ·
(949) 728-4126 Dr. Weidong Zhou, M.D.San Juan Capistrano, CA · No drug or device payments recorded (2025) ·
(949) 728-4188 Dr. Zhong Zhang, M.D., PH.D.San Juan Capistrano, CA · No drug or device payments recorded (2025) ·
(949) 728-4335 Dr. Eric Weng, M.D.San Leandro, CA · No drug or device payments recorded (2025) ·
(510) 454-1000 Dr. Dawn Ellerson, M.D.San Luis Obispo, CA · No drug or device payments recorded (2025) ·
(805) 541-6033 Dr. Jessica FarrellSan Luis Obispo, CA · No drug or device payments recorded (2025) ·
(805) 541-6033 Dr. Morgan Wilson, MDSan Luis Obispo, CA · No drug or device payments recorded (2025) ·
(805) 503-9493 Dr. Oliver Press, M.D.San Luis Obispo, CA · No drug or device payments recorded (2025) ·
(805) 546-0907 Dr. Ronald Rocha, M.D.San Luis Obispo, CA · No drug or device payments recorded (2025) ·
(805) 541-6033 Dr. Ronnie Abraham, MDSan Luis Obispo, CA · $18 in drug and device payments (2025) ·
(805) 548-1550 Dr. Ryan Berry, MDSan Luis Obispo, CA · No drug or device payments recorded (2025) ·
(805) 548-1550 Dr. Carl MillwardSan Mateo, CA · No drug or device payments recorded (2025) ·
(650) 573-2222 Common questions
How many Anatomic Pathology & Clinical Pathology providers are in California?There are 1,553 Anatomic Pathology & Clinical Pathology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Anatomic Pathology & Clinical Pathology providers in California offer telehealth?Yes. 5 of the 1,553 Anatomic Pathology & Clinical Pathology providers in California (about 0%) report offering telehealth services in CMS data.
Which cities in California have the most Anatomic Pathology & Clinical Pathology providers?Los Angeles (206), Stanford (115), San Diego (107) have the highest concentration of Anatomic Pathology & Clinical Pathology providers in California.
How many Anatomic Pathology & Clinical Pathology providers in California received drug or device company payments?313 of 1,553 Anatomic Pathology & Clinical Pathology providers in California (20%) 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 Pathologists (Anatomic & Clinical) in California work in independent practices or large health systems?Among 840 Pathologists (Anatomic & Clinical) in California enrolled in Medicare, 25% bill through a solo or small practice with fewer than 10 clinicians, 27% through a mid-size group of 10 to 99, and 48% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Pathologists (Anatomic & Clinical) in California work at?According to CMS facility affiliation records, the California hospitals where the most Pathologists (Anatomic & Clinical) hold privileges are Stanford Health Care in Stanford; Stanford Health Care Tri-Valley in Pleasanton; Cedars-Sinai Medical Center in Los Angeles.
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