Hematologists (Pathology) in California
Data updated monthly · Last refresh October 2026
65 Hematology (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.
65providers
Los Angelestop city
Hematology (Pathology) by city in California
Choose a city to see providers there.
Where Hematologists (Pathology) in California practice
From CMS Medicare enrollment records covering 30 of the 65 providers listed here (46%). Providers who do not bill Medicare are not included in these figures.
13%solo or small practice (under 10 clinicians)
7%mid-size group (10 to 99)
80%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Hematologists (Pathology) | All clinicians in group | Main city |
| City of Hope Medical Foundation | 10 | 964 | Duarte |
| University of California San Francisco | 4 | 1,780 | San Francisco |
| Usc Care Medical Group Inc. | 3 | 1,378 | Los Angeles |
| Southern California Permanente Medical Group | 2 | 11,250 | Los Angeles |
| Faculty Physicians and Surgeons of Llusm | 2 | 1,313 | Loma Linda |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Hematologists (Pathology) affiliated |
| Uci Health-Orange | Orange | Government | 4 of 5 | 4 |
| UCSF Medical Center | San Francisco | Nonprofit | 4 of 5 | 4 |
| Keck Hospital of Usc | Los Angeles | Nonprofit | 5 of 5 | 3 |
| Hoag Memorial Hospital Presbyterian | Newport Beach | Nonprofit | 5 of 5 | 3 |
| Providence Mission Hospital | Mission Viejo | Nonprofit | 5 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.
Hematology (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. Anselm Hii, M.D.Aliso Viejo, CA · No drug or device payments recorded (2025) ·
(949) 425-5713 Dr. Sing-tsung Chen, M.D., PH.D.Aliso Viejo, CA · No drug or device payments recorded (2025) ·
(949) 425-5714 Dr. Vladislav Chizhevsky, M.D.Aliso Viejo, CA · $4,145 in drug and device payments (2025) ·
(949) 425-5754 Dr. Dorna Rezania, MDBerkeley, CA · No drug or device payments recorded (2025) ·
(510) 559-5116 Dr. Aine Yung, M.D.Carlsbad, CA · $118 in drug and device payments (2025) ·
(760) 268-6200 Dr. Fouad Abdelhalim, M.D.Carlsbad, CA · No drug or device payments recorded (2025) ·
(760) 516-5175 Dr. Robert Lin, M.D.Carlsbad, CA · No drug or device payments recorded (2025) ·
(760) 268-6200 Dr. Sue Beruti, M.D.Carlsbad, CA · No drug or device payments recorded (2025) ·
(310) 922-8779 Dr. Swati Shah, M.D.Carlsbad, CA · $59 in drug and device payments (2025) ·
(760) 268-6200 Dr. Thomas Laipply, M.D.Carlsbad, CA · No drug or device payments recorded (2025) ·
(760) 602-9279 Dr. Wendy Yang, MDCarlsbad, CA · No drug or device payments recorded (2025) ·
(760) 516-5185 Dr. Karl Gaal, MDDuarte, CA · No drug or device payments recorded (2025) ·
(626) 359-8111 Dr. Lorinda Soma, M.D.Duarte, CA · No drug or device payments recorded (2025) ·
(626) 256-4673 Dr. Michelle Afkhami, M.D.Duarte, CA · No drug or device payments recorded (2025) ·
(310) 748-0337 Dr. Mingjian You, M.D., PH.D.Duarte, CA · No drug or device payments recorded (2025) ·
(800) 826-4673 Dr. Olga Danilova, M.D., PH.D.Duarte, CA · No drug or device payments recorded (2025) ·
(626) 256-4673 Dr. Raju Pillai, MDDuarte, CA · No drug or device payments recorded (2025) ·
(626) 256-4673 Dr. Ryan Jackson, M.D., PH.D., M.ENG. Dr. Wei WangDuarte, CA · No drug or device payments recorded (2025) ·
(800) 826-4673 Dr. Winston Lee, MD, PHDDuarte, CA · No drug or device payments recorded (2025) ·
(626) 256-4673 Dr. Gerald Hanson, M.D.Huntington Beach, CA · No drug or device payments recorded (2025) ·
(714) 963-6203 Dr. Changjun Yue, M.D., PH.D. Dr. Sally Agersborg, M.D., PH.D.Irvine, CA · No drug or device payments recorded (2025) ·
(949) 540-9421 Dr. Wayne Chen, MD PHDIrvine, CA · No drug or device payments recorded (2025) ·
(949) 754-9389 Dr. Cynthia Snyder, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 822-6283 Dr. Edward Rowsell, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-5175 Dr. Jun Wang, M.D.Loma Linda, CA · $161 in drug and device payments (2025) ·
(909) 558-5175 Dr. Milton Drachenberg, M.D., PH.D.Long Beach, CA · No drug or device payments recorded (2025) ·
(562) 933-0828 Dr. Adam Cloe, M.D.Los Angeles, CA · $78 in drug and device payments (2025) ·
(773) 430-8803 Dr. Aihong Liu, M.D., PH.D.Los Angeles, CA · $135 in drug and device payments (2025) ·
(323) 783-0298 Dr. Charles Koo, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-4011 Dr. David Yau, MDLos Angeles, CA · $20 in drug and device payments (2025) ·
(323) 442-2582 Dr. Endi Wang, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(323) 865-3000 Dr. Faramarz Naeim, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 794-8285 Dr. Franklin Sedarat, M.D., M.S.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 482-5000 Dr. Hongbin Zha, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-4011 Dr. Joon Lee, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 482-5337 Dr. Lhara Sumarriva Lezama, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(833) 574-2273 Dr. Opal Reddy, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 206-0944 Dr. Patrick Browne, M.D., PH.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 482-5352 Dr. Sassan Rostamipour Shiroyeh, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 482-5331 Dr. Tse-chang Cheng, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(323) 783-4011 Dr. Ashley Gamayo, MD, MPHOrange, CA · No drug or device payments recorded (2025) ·
(714) 385-2921 Dr. Genevieve Crane, M.D., PH.D.Orange, CA · No drug or device payments recorded (2025) ·
(714) 456-8888 Dr. Imran Siddiqi, M.D., PH.D.Orange, CA · $29,628 in drug and device payments (2025) ·
(714) 456-8888 Dr. Arundhati Perkash, M.D., PH.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 493-5000 Dr. Carolyn Li, MDRoseville, CA · No drug or device payments recorded (2025) ·
(310) 882-8988 Dr. Farnoush Moen, M.D.Sacramento, CA · No drug or device payments recorded (2025) ·
(916) 734-2395 Common questions
How many Hematology (Pathology) providers are in California?There are 65 Hematology (Pathology) providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Which cities in California have the most Hematology (Pathology) providers?Los Angeles (14), Duarte (11), San Francisco (9) have the highest concentration of Hematology (Pathology) providers in California.
How many Hematology (Pathology) providers in California received drug or device company payments?14 of 65 Hematology (Pathology) providers in California (22%) 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 Hematologists (Pathology) in California work in independent practices or large health systems?Among 30 Hematologists (Pathology) in California enrolled in Medicare, 13% bill through a solo or small practice with fewer than 10 clinicians, 7% through a mid-size group of 10 to 99, and 80% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Hematologists (Pathology) in California work at?According to CMS facility affiliation records, the California hospitals where the most Hematologists (Pathology) hold privileges are Uci Health-Orange in Orange; UCSF Medical Center in San Francisco; Keck Hospital of Usc in Los Angeles.
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