Clinical Pathologists in California
Data updated monthly · Last refresh October 2026
44 Clinical Pathology providers practice in California. 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.
44providers
Los Angelestop city
Clinical Pathology by city in California
Choose a city to see providers there.
Where Clinical Pathologists in California practice
From CMS Medicare enrollment records covering 13 of the 44 providers listed here (30%). Providers who do not bill Medicare are not included in these figures.
Largest practice groups
| Group (as registered with Medicare) | Clinical Pathologists | All clinicians in group | Main city |
| UCLA Pathology and Laboratory Medicine Group | 2 | 68 | Los Angeles |
| Regents of the University of California | 2 | 40 | Orange |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Clinical Pathologists affiliated |
| Hoag Memorial Hospital Presbyterian | Newport Beach | Nonprofit | 5 of 5 | 3 |
| Santa Monica - UCLA Med Ctr & Orthopaedic Hospital | Santa Monica | Nonprofit | 5 of 5 | 2 |
| Uci Health-Orange | Orange | Government | 4 of 5 | 2 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
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. Erick Lin, M.D., PH.D.Aliso Viejo, CA · No drug or device payments recorded (2025) ·
(818) 850-9774 Dr. Jonathan Gullett, M.D.Chino Hills, CA · No drug or device payments recorded (2025) ·
(909) 703-6033 Dr. Keane LaiDuarte, CA · No drug or device payments recorded (2025) ·
(626) 256-4673 Dr. Shirong Wang, MDDuarte, CA · No drug or device payments recorded (2025) ·
(626) 359-8111 Dr. Wayne Garrett, DOHercules, CA · No drug or device payments recorded (2025) ·
(510) 662-5200 Dr. Alan Epstein, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 442-1172 Dr. Ashley Hagiya, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(323) 442-2582 Dr. Giancarlo CardozaLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 206-0944 Dr. Ibrahim Hajjali, MD, MSCLos Angeles, CA · No drug or device payments recorded (2025) ·
(626) 689-1931 Dr. Linda Szymanski, D.O.Los Angeles, CA · No drug or device payments recorded (2025) ·
(888) 631-2452 Dr. Nwe Nwe Soe, MBBS PHD D(ABHI)Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 206-0944 Dr. Philip Petersen, MD, PHDLos Angeles, CA · No drug or device payments recorded (2025) ·
(626) 991-8927 Dr. Ryan Schmidt, M.D., PH.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(888) 631-2452 Dr. Wenjing CaoLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 206-0944 Dr. Zhen MeiLos Angeles, CA · $1,949 in drug and device payments (2025) ·
(310) 267-3561 Dr. Tyler JenkinsMarysville, CA · $14 in drug and device payments (2025) ·
(530) 749-4467 Dr. Jennifer Armstrong, MDNewport Beach, CA · $304 in drug and device payments (2025) ·
(949) 706-2887 Dr. Abraham Qavi, M.D., PH.D.Orange, CA · No drug or device payments recorded (2025) ·
(714) 880-7812 Dr. Arjun Reddy, MD, MBAOrange, CA · No drug or device payments recorded (2025) ·
(714) 506-0737 Dr. Frank Connors, MSPasadena, CA · No drug or device payments recorded (2025) ·
(714) 595-2176 Dr. Desiree HerreraPatterson, CA · No drug or device payments recorded (2025) ·
(209) 289-9281 Dr. Ishwarlal Jialal, M.D., PHD.Sacramento, CA · No drug or device payments recorded (2025) ·
(916) 734-0694 Dr. Lorne Holland, MDSacramento, CA · No drug or device payments recorded (2025) ·
(916) 734-3331 Dr. Caleb King, M.D.San Diego, CA · No drug or device payments recorded (2025) ·
(619) 543-7242 Dr. Ian Finn, M.D., PH.D.San Diego, CA · No drug or device payments recorded (2025) ·
(312) 953-6880 Dr. John Soong, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(909) 662-1326 Dr. Mark Wahrenbrock, M.D., PH.D.San Diego, CA · $28,279 in drug and device payments (2025) ·
(888) 992-7555 Dr. Nicholas Bevins, MD PHDSan Diego, CA · No drug or device payments recorded (2025) ·
(831) 277-9487 Dr. Richard Hockett, M.D.San Diego, CA · No drug or device payments recorded (2025) ·
(317) 217-9507 Dr. Tristan Mcknight, MDSan Diego, CA · No drug or device payments recorded (2025) ·
(858) 966-5944 Dr. Arun Wiita, M.D., PH.D.San Francisco, CA · $1,500 in drug and device payments (2025) ·
(415) 353-1469 Dr. Edward Sittler, MDSan Francisco, CA · No drug or device payments recorded (2025) ·
(415) 373-6706 Dr. Gisela Marrero RiveraSan Francisco, CA · No drug or device payments recorded (2025) ·
(415) 353-1667 Dr. Tara Saunders, M.D.San Francisco, CA · No drug or device payments recorded (2025) ·
(415) 353-7359 Dr. Latisha WilliamsonSan Jacinto, CA · No drug or device payments recorded (2025) ·
(702) 937-5694 Dr. Joan Bernard, M.D.San Jose, CA · No drug or device payments recorded (2025) ·
(408) 885-5000 Dr. Jack Tung, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-5353 Dr. Maya Kasowski, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Muthukumar Ramanathan, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Priya Velu, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Steven Baker, M.D. PH.D.Stanford, CA · $29 in drug and device payments (2025) ·
(650) 493-5000 Dr. Sherrie Hawkins-cooper, CPT1Stockton, CA · No drug or device payments recorded (2025) ·
(209) 518-5226 Dr. Conrad Gorospe, M.D.Walnut, CA · No drug or device payments recorded (2025) ·
(626) 839-4696 Common questions
How many Clinical Pathology providers are in California?There are 44 Clinical Pathology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Which cities in California have the most Clinical Pathology providers?Los Angeles (10), San Diego (7), Stanford (5) have the highest concentration of Clinical Pathology providers in California.
How many Clinical Pathology providers in California received drug or device company payments?7 of 44 Clinical Pathology providers in California (16%) 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.
Which hospitals do Clinical Pathologists in California work at?According to CMS facility affiliation records, the California hospitals where the most Clinical Pathologists hold privileges are Hoag Memorial Hospital Presbyterian in Newport Beach; Santa Monica - UCLA Med Ctr & Orthopaedic Hospital in Santa Monica; Uci Health-Orange in Orange.
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