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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. Brian Kim, M.D.
Sacramento, CA · $637 in drug and device payments (2025) · (916) 453-3300
Dr. Cheryl Ho, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3772
Dr. Chunhui Fang, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 497-3000
Dr. Colin Spears, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 692-8480
Dr. David Gandara, M.D.
Sacramento, CA · $32,794 in drug and device payments (2025) · Telehealth · (916) 734-3772
Dr. David Sun, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-5959
Dr. Dazhi Cen, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Derick Lau, M.D., PH.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3772
Dr. Ebaa Al-obeidi
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-2737
Dr. Edward Hearn, MD
Sacramento, CA · $125 in drug and device payments (2025) · (916) 973-5000
Dr. Edward Kim, M.D., PHD
Sacramento, CA · $35,691 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Elias Kiwan, M.D.
Sacramento, CA · $3,256 in drug and device payments (2025) · Telehealth · (916) 453-3300
Dr. Eve Rodler, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-5959
Dr. Francisco Socola Cuzco, M.D.
Sacramento, CA · $9,929 in drug and device payments (2025) · Telehealth · (916) 734-5773
Dr. Frederick Meyers, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Gilbert Mandell, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Grace Ku, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Grigorios Chrysofakis, MD
Sacramento, CA · $559 in drug and device payments (2025) · Telehealth · (916) 453-3300
Dr. Hao To, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Helen Chew, M.D.
Sacramento, CA · $151 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Helen Chow, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-5959
Dr. Hoa Duong, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 973-5000
Dr. I-yeh Gong, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3771
Dr. Jasdeepa Nagi, M.D.
Sacramento, CA · $228 in drug and device payments (2025) · Telehealth · (916) 453-3300
Dr. Jeanna Welborn, M.D.
Sacramento, CA · $43 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Jeffrey Mcleroy, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3771
Dr. Jerry Powell, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3772
Dr. Jesse Adams, MD
Sacramento, CA · $145 in drug and device payments (2025) · (916) 973-5000
Dr. Jocelyn Wu, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 497-3100
Dr. Jonathan Riess, M.D., M.S.
Sacramento, CA · $33,726 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Joseph Tuscano, M.D.
Sacramento, CA · $201 in drug and device payments (2025) · Telehealth · (916) 734-5981
Dr. Justin Chen
Sacramento, CA · No drug or device payments recorded (2025) · (650) 723-6661
Dr. Kanishka Patel
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-5959
Dr. Karen Kelly, M.D.
Sacramento, CA · $4,778 in drug and device payments (2025) · (916) 734-5959
Dr. Kendra Hutchinson, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-5959
Dr. Kit Lam, M.D., PH.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3772
Dr. Kit Tam, M.D., M.H.S.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-5959
Dr. Lai Hui, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Mamta Parikh, M.D., M.S.
Sacramento, CA · $2,793 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Mehrad Abedi, M.D.
Sacramento, CA · $34,505 in drug and device payments (2025) · Telehealth · (916) 734-5981
Dr. Melissa Williams, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 453-3300
Dr. Merin Stephen, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Michael Carroll, M.D.
Sacramento, CA · $20 in drug and device payments (2025) · (916) 453-3313
Dr. Michael Tanaka, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3772
Dr. Mili Arora, MD
Sacramento, CA · $232 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Mrinal Dutia, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3771
Dr. Mustaqeem Siddiqui, MBBS
Sacramento, CA · $2,760 in drug and device payments (2025) · Telehealth · (916) 733-4400
Dr. Nabil Ghani, M.D.
Sacramento, CA · $29 in drug and device payments (2025) · Telehealth · (916) 887-1340
Dr. Naseem Esteghamat, M.D.
Sacramento, CA · $355 in drug and device payments (2025) · Telehealth · (916) 734-3772
Dr. Nikhil Patel
Sacramento, CA · $122 in drug and device payments (2025) · (916) 734-2011

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

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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.