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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.

Hematology & Oncology in Los Angeles152 providers
Hematology & Oncology in San Diego89 providers
Hematology & Oncology in Sacramento77 providers
Hematology & Oncology in San Francisco64 providers
Hematology & Oncology in Orange62 providers
Hematology & Oncology in La Jolla46 providers
Hematology & Oncology in Santa Monica43 providers
Hematology & Oncology in Torrance33 providers
Hematology & Oncology in Fresno31 providers
Hematology & Oncology in Stanford30 providers
Hematology & Oncology in Walnut Creek23 providers
Hematology & Oncology in Newport Beach21 providers
Hematology & Oncology in Rancho Mirage19 providers
Hematology & Oncology in Long Beach18 providers
Hematology & Oncology in Roseville17 providers
Hematology & Oncology in Fountain Valley17 providers
Hematology & Oncology in Beverly Hills16 providers
Hematology & Oncology in Santa Barbara16 providers
Hematology & Oncology in San Jose15 providers
Hematology & Oncology in Oakland14 providers
Hematology & Oncology in Downey14 providers
Hematology & Oncology in Anaheim14 providers
Hematology & Oncology in Irvine13 providers
Hematology & Oncology in Santa Rosa13 providers

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. Jerry Lee, MD
San Francisco, CA · $14,184 in drug and device payments (2025) · Telehealth · (415) 476-1000
Dr. Jillian Simard
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (847) 372-1480
Dr. John Davoren, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Jordyn Silverstein, MD
San Francisco, CA · $181 in drug and device payments (2025) · (818) 800-0129
Dr. Julia Carnevale
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2739
Dr. Kimberly Rickman
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4616
Dr. Lindsey Draper, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 281-5100
Dr. Mallika Dhawan
San Francisco, CA · No drug or device payments recorded (2025) · (510) 579-5972
Dr. Matthew Jones, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Melissa Ryan, RN
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-1383
Dr. Michael Burgess, M.D., PH.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-2407
Dr. Michael Mcgrath, M.D., PHD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-5268
Dr. Michael Randall, MD
San Francisco, CA · $288 in drug and device payments (2025) · Telehealth · (415) 221-4810
Dr. Nancy Valente, MD
San Francisco, CA · $135 in drug and device payments (2025) · (650) 438-0852
Dr. Nayha Tahir, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 833-3692
Dr. Neha Venkatesh, MD
San Francisco, CA · $134 in drug and device payments (2025) · (415) 353-7624
Dr. Niharika Dixit, M.D
San Francisco, CA · $7,617 in drug and device payments (2025) · (415) 476-4082
Dr. Pamela Klein, MD
San Francisco, CA · $509,601 in drug and device payments (2025) · (650) 238-4640
Dr. Patricia Cornett, M.D.
San Francisco, CA · $29 in drug and device payments (2025) · Telehealth · (415) 221-4810
Dr. Paul Volberding, MD
San Francisco, CA · $8,705 in drug and device payments (2025) · (415) 750-2037
Dr. Raymond Liu, M.D.
San Francisco, CA · $61 in drug and device payments (2025) · (415) 353-1000
Dr. Rebecca Olin, MD
San Francisco, CA · $4,360 in drug and device payments (2025) · Telehealth · (415) 353-2063
Dr. Samuel Brondfield, M.D.
San Francisco, CA · $92 in drug and device payments (2025) · (415) 476-9000
Dr. Sarah Hsu, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 885-7276
Dr. Shagun Arora, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-2421
Dr. Sonali Harchandani, M.D.
San Francisco, CA · $121 in drug and device payments (2025) · Telehealth · (415) 476-7119
Dr. Stephanie Jeske, MD, MSC
San Francisco, CA · $127 in drug and device payments (2025) · Telehealth · (415) 668-0160
Dr. Sunny Wang, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 885-3882
Dr. Terence Friedlander, MS
San Francisco, CA · $36,762 in drug and device payments (2025) · Telehealth · (415) 885-7276
Dr. Tridu Huynh, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2742
Dr. Victoria Wang, M.D., PHD
San Francisco, CA · $890 in drug and device payments (2025) · Telehealth · (415) 476-0584
Dr. Wesley Kidder, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-9888
Dr. Xiaosong Zhang, MD, PHD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 885-7276
Dr. Yuankai Lin, MD, PHD
San Francisco, CA · $32 in drug and device payments (2025) · (628) 206-2407
Dr. Dong Xiang, MD
San Gabriel, CA · $3,937 in drug and device payments (2025) · Telehealth · (562) 735-3226
Dr. James Golden, M.D.
San Gabriel, CA · No drug or device payments recorded (2025) · (626) 287-8642
Dr. Adour Adrouny, M.D.
San Jose, CA · $458 in drug and device payments (2025) · Telehealth · (408) 356-1911
Dr. Alaa Altahan
San Jose, CA · $17 in drug and device payments (2025) · (408) 972-6560
Dr. Charlene Lee, MD
San Jose, CA · $3,714 in drug and device payments (2025) · (408) 923-3388
Dr. Eric Imoto, D.O.
San Jose, CA · $25 in drug and device payments (2025) · Telehealth · (408) 972-7000
Dr. Gary Zhao, MD
San Jose, CA · $231 in drug and device payments (2025) · Telehealth · (408) 885-5969
Dr. Jankikeerthika Dharmarpandi, MD
San Jose, CA · $329 in drug and device payments (2025) · (408) 972-7000
Dr. Lee Levitt, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-4146
Dr. Leonid Yavorkovsky, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Maria Pilar Ivanov, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Michael Lee, MD
San Jose, CA · No drug or device payments recorded (2025) · (909) 719-9924
Dr. Myron Kwong, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 972-7000
Dr. Pei-hua (peggy) Lu, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 347-2190
Dr. Sangeeta Aggarwal, MD
San Jose, CA · $246 in drug and device payments (2025) · Telehealth · (408) 885-5000
Dr. Sang Hoon Lee, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 425-0200

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.

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.

Related reading on HealthcareDiscovery.AI

Hematology & Oncology in all 50 states Search all 1,582 in the directory Ask Zach for help choosing

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Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Hematology & Oncology in California? Get featured.