Hematologists and Oncologists in California
Data updated monthly · Last refresh October 2026
1,582 Hematology & Oncology providers practice in California, including 855 (54%) 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.
1,582providers
855telehealth
Los Angelestop city
Hematology & Oncology by city in California
Choose a city to see providers there.
Where Hematologists and Oncologists in California practice
From CMS Medicare enrollment records covering 1,081 of the 1,582 providers listed here (68%). Providers who do not bill Medicare are not included in these figures.
11%solo or small practice (under 10 clinicians)
12%mid-size group (10 to 99)
77%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Hematologists and Oncologists | All clinicians in group | Main city |
| The Regents of the University of California | 87 | 1,426 | Santa Monica |
| Southern California Permanente Medical Group | 71 | 11,250 | Anaheim |
| Permanente Medical Group Inc. | 67 | 10,928 | Roseville |
| City of Hope Medical Foundation | 62 | 964 | South Pasadena |
| Regents of the University of California | 54 | 2,047 | San Diego |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Hematologists and Oncologists affiliated |
| Ronald Reagan UCLA Medical Center | Los Angeles | Government | 4 of 5 | 92 |
| Uci Health-Orange | Orange | Government | 4 of 5 | 74 |
| Santa Monica - UCLA Med Ctr & Orthopaedic Hospital | Santa Monica | Nonprofit | 5 of 5 | 65 |
| UC San Diego Health Hillcrest - Hillcrest Med Ctr | San Diego | Nonprofit | 5 of 5 | 58 |
| Cedars-Sinai Medical Center | Los Angeles | Nonprofit | 5 of 5 | 56 |
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 & Oncology 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. Dorcas Chi, M.D.Alhambra, CA · $18 in drug and device payments (2025) · Telehealth ·
(626) 588-2825 Dr. Gavin Hui, MDAlhambra, CA · No drug or device payments recorded (2025) · Telehealth ·
(626) 588-2825 Dr. Yi-kong Keung, MDAlhambra, CA · $140 in drug and device payments (2025) · Telehealth ·
(626) 588-2825 Dr. Ashraf Aziz, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Baijia Jiang, M.D.Anaheim, CA · $5,208 in drug and device payments (2025) · Telehealth ·
(714) 999-1465 Dr. Devi Jane Asuncion, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Farah Brasfield, MDAnaheim, CA · $265 in drug and device payments (2025) ·
(888) 988-2800 Dr. Jayaram Bharadwaj, M.D.Anaheim, CA · $5,118 in drug and device payments (2025) · Telehealth ·
(714) 999-1465 Dr. Navid Jamshidi, M.D.Anaheim, CA · No drug or device payments recorded (2025) ·
(714) 644-7941 Dr. Nawid Sarwari, M.D.Anaheim, CA · $6,044 in drug and device payments (2025) ·
(714) 399-0620 Dr. Swarajya Vemuri, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(888) 988-2800 Dr. Thiri Khin, M.DAnaheim, CA · $2,486 in drug and device payments (2025) ·
(714) 999-1465 Dr. Thomas Lee, M.D.Anaheim, CA · No drug or device payments recorded (2025) ·
(714) 279-4469 Dr. Thu-tam Huynh, MDAnaheim, CA · No drug or device payments recorded (2025) ·
(714) 376-5170 Dr. Bimal Patel, M.D.Antioch, CA · $1,299 in drug and device payments (2025) · Telehealth ·
(925) 778-0679 Dr. Jiyon Choi, MDAntioch, CA · $3,508 in drug and device payments (2025) · Telehealth ·
(925) 778-0679 Dr. John Ganey, MDAntioch, CA · No drug or device payments recorded (2025) ·
(925) 778-0679 Dr. Margaret (meg) Seaver, MDAntioch, CA · $588 in drug and device payments (2025) · Telehealth ·
(925) 778-0679 Dr. Prasad Pillai, MDAntioch, CA · $2,328 in drug and device payments (2025) · Telehealth ·
(925) 778-0679 Dr. Srikanth Reddy, M.D.Antioch, CA · $7,404 in drug and device payments (2025) · Telehealth ·
(925) 778-0679 Dr. Wilson Tong, M.D.Antioch, CA · $6,359 in drug and device payments (2025) · Telehealth ·
(925) 778-0679 Dr. Benjamin Stafford, M.D.Arcadia, CA · No drug or device payments recorded (2025) ·
(626) 446-4461 Dr. Henry Wang, MDArcadia, CA · $645 in drug and device payments (2025) · Telehealth ·
(626) 574-2710 Dr. James Shen, M.D.Arcadia, CA · $99 in drug and device payments (2025) · Telehealth ·
(626) 218-9840 Dr. Jeany Cheng, N.P.Arcadia, CA · $2,250 in drug and device payments (2025) ·
(626) 821-5998 Dr. Monty Polonsky, M.D.Arcadia, CA · $4,477 in drug and device payments (2025) · Telehealth ·
(626) 446-4461 Dr. Richard Shapiro, M.D. Dr. David Palchak, M.D.Arroyo Grande, CA · $426 in drug and device payments (2025) · Telehealth ·
(805) 474-9143 Dr. Deborah Villa, MDAtascadero, CA · $192 in drug and device payments (2025) ·
(805) 466-1001 Dr. Shane Wing, MDAtascadero, CA · $3,405 in drug and device payments (2025) ·
(805) 466-1001 Dr. Dron Gauchan, M.DAuburn, CA · $1,085 in drug and device payments (2025) · Telehealth ·
(530) 886-6587 Dr. Khine Win, M.D.Auburn, CA · $1,064 in drug and device payments (2025) · Telehealth ·
(530) 889-6090 Dr. Prathima Prodduturi, M.D.Auburn, CA · $677 in drug and device payments (2025) · Telehealth ·
(530) 889-6090 Dr. Thomas Roschak, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 885-0644 Dr. Vijay Suhag, M.D.Auburn, CA · $256 in drug and device payments (2025) · Telehealth ·
(530) 886-6587 Dr. Abhay Risbud, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(800) 353-5400 Dr. James Chang, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 316-8888 Dr. Kyaw Tun, MDBakersfield, CA · $20 in drug and device payments (2025) ·
(800) 353-5400 Dr. Madiha Naseem, MDBakersfield, CA · $204 in drug and device payments (2025) · Telehealth ·
(661) 863-2200 Dr. Ricardo SalasBakersfield, CA · $311 in drug and device payments (2025) · Telehealth ·
(661) 491-5060 Dr. Vikas Ghai, M.D.Bakersfield, CA · $292 in drug and device payments (2025) · Telehealth ·
(616) 323-4673 Dr. Vinh-linh Nguyen, MDBakersfield, CA · $481 in drug and device payments (2025) · Telehealth ·
(661) 491-5060 Dr. Aswini Padmanabhan, MDBaldwin Park, CA · No drug or device payments recorded (2025) ·
(626) 851-1011 Dr. Debbie Bracamonte, MDBaldwin Park, CA · No drug or device payments recorded (2025) ·
(626) 851-1011 Dr. Eliezer Manacop, MDBaldwin Park, CA · No drug or device payments recorded (2025) ·
(626) 851-1011 Dr. John Liang, MDBaldwin Park, CA · No drug or device payments recorded (2025) ·
(626) 851-1011 Conditions Hematology & Oncology providers in California commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Hematology & Oncology providers. Individual practices vary, so confirm with the provider before booking.
- Breast cancer
- Lung cancer
- Lymphoma
- Leukemia
- Anemia
- Blood disorders
Common questions
How many Hematology & Oncology providers are in California?There are 1,582 Hematology & Oncology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Hematology & Oncology providers in California offer telehealth?Yes. 855 of the 1,582 Hematology & Oncology providers in California (about 54%) report offering telehealth services in CMS data.
Which cities in California have the most Hematology & Oncology providers?Los Angeles (152), San Diego (89), Sacramento (77) have the highest concentration of Hematology & Oncology providers in California.
How many Hematology & Oncology providers in California received drug or device company payments?995 of 1,582 Hematology & Oncology providers in California (63%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Hematology & Oncology providers in California treat?Hematology & Oncology providers commonly treat breast cancer, lung cancer, lymphoma, leukemia, anemia and related conditions. Individual practices vary, so confirm with the provider before booking.
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 and Oncologists in California work in independent practices or large health systems?Among 1,081 Hematologists and Oncologists in California enrolled in Medicare, 11% bill through a solo or small practice with fewer than 10 clinicians, 12% through a mid-size group of 10 to 99, and 77% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Hematologists and Oncologists in California work at?According to CMS facility affiliation records, the California hospitals where the most Hematologists and Oncologists hold privileges are Ronald Reagan UCLA Medical Center in Los Angeles; Uci Health-Orange in Orange; Santa Monica - UCLA Med Ctr & Orthopaedic Hospital in Santa Monica.
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