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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. Vijay Rao, MD
Redding, CA · $3,012 in drug and device payments (2025) · (530) 245-5900
Dr. Emad Ibrahim, MD
Redlands, CA · $27,051 in drug and device payments (2025) · (909) 793-4336
Dr. Melissa Torrey, M.D.
Redlands, CA · $629 in drug and device payments (2025) · (909) 793-4336
Dr. Andrew Horodner, M.D.
Redondo Beach, CA · $513 in drug and device payments (2025) · Telehealth · (310) 750-3300
Dr. Nora Ku, MD
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 750-3300
Dr. Swati Sikaria, M.D.
Redondo Beach, CA · $598 in drug and device payments (2025) · Telehealth · (310) 750-3300
Dr. Abraham Leung, MD
Redwood City, CA · No drug or device payments recorded (2025) · (650) 299-2000
Dr. Dorothy Nguyen, MD
Redwood City, CA · $500 in drug and device payments (2025) · (650) 299-2588
Dr. Jason Sun, M.D.
Redwood City, CA · No drug or device payments recorded (2025) · (650) 299-4840
Dr. Linda Hoang, M.D.
Redwood City, CA · $23 in drug and device payments (2025) · (650) 299-4840
Dr. Sandra Canales, MD
Redwood City, CA · No drug or device payments recorded (2025) · (650) 299-2000
Dr. Everard Hughes, MD
Ridgecrest, CA · No drug or device payments recorded (2025) · (760) 499-3360
Dr. Andy Jang, MD
Riverside, CA · $5,173 in drug and device payments (2025) · Telehealth · (909) 353-2000
Dr. Annie Oh, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-4418
Dr. Candice Ruby, MD
Riverside, CA · $2,106 in drug and device payments (2025) · Telehealth · (909) 353-2000
Dr. Fawaz Gailani, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Ghaleb Saab, MD
Riverside, CA · $16 in drug and device payments (2025) · (951) 321-6350
Dr. Indrani Gill, M.D.
Riverside, CA · $1,365 in drug and device payments (2025) · (951) 788-2770
Dr. Laxmi Iyer, M.D.,
Riverside, CA · $4,607 in drug and device payments (2025) · Telehealth · (951) 276-2760
Dr. Muhammad Muslim, MD
Riverside, CA · $2,953 in drug and device payments (2025) · (951) 394-7028
Dr. Sam Yeh, MD
Riverside, CA · $1,071 in drug and device payments (2025) · Telehealth · (909) 353-2000
Dr. Soe Maunglay, MD
Riverside, CA · $379 in drug and device payments (2025) · (951) 394-3055
Dr. Vaishali Saste, M.D.
Riverside, CA · $550 in drug and device payments (2025) · Telehealth · (951) 321-6340
Dr. Xinting Fu, MD
Riverside, CA · $284 in drug and device payments (2025) · Telehealth · (909) 353-2000
Dr. Gurvinder Shaheed, M.D.
Rocklin, CA · No drug or device payments recorded (2025) · Telehealth · (916) 409-1400
Dr. Dinesh Kotak, MD
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 784-4000
Dr. Frank Hsieh, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Jaspreet Dhillon, M.D.
Roseville, CA · $25 in drug and device payments (2025) · Telehealth · (916) 782-5106
Dr. Julie Hersch, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Krishna Goparaju, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-5626
Dr. Kristie Bobolis, M.D.
Roseville, CA · $225 in drug and device payments (2025) · Telehealth · (916) 782-5106
Dr. Kristin Arreola, M.D.
Roseville, CA · $561 in drug and device payments (2025) · Telehealth · (916) 782-5106
Dr. Li Hu, MD
Roseville, CA · $150 in drug and device payments (2025) · (916) 784-4000
Dr. Lisa Law, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-5626
Dr. Marie Krielle Tasha Pantino, MD
Roseville, CA · $467 in drug and device payments (2025) · Telehealth · (916) 784-5626
Dr. Mohamad Adada, M.D., PHD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-5626
Dr. Rajeswari Chellappah, M.D.
Roseville, CA · $108 in drug and device payments (2025) · Telehealth · (916) 782-5106
Dr. Sharon Peng, M.D.
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 784-5626
Dr. Sidney Crain, MD
Roseville, CA · $1,208 in drug and device payments (2025) · (916) 784-4000
Dr. Sivakumar Reddy, MD
Roseville, CA · $422 in drug and device payments (2025) · Telehealth · (916) 782-5106
Dr. Stacey Stubblefield, M. D.
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 918-5553
Dr. Uma Gowda, MD
Roseville, CA · $3,638 in drug and device payments (2025) · Telehealth · (916) 782-5106
Dr. Aaron Rosenberg, M.D., M.S.
Sacramento, CA · $7,622 in drug and device payments (2025) · Telehealth · (916) 734-5981
Dr. Aaron Tsumura, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (167) 345-9599
Dr. Adam Giermasz, M.D., PHD
Sacramento, CA · $43,704 in drug and device payments (2025) · Telehealth · (916) 734-3461
Dr. Anjlee Mahajan, M.D.
Sacramento, CA · $12,823 in drug and device payments (2025) · Telehealth · (916) 734-3461
Dr. Arash Velayati, M.D.
Sacramento, CA · $352 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Ashley Yuan
Sacramento, CA · $28 in drug and device payments (2025) · Telehealth · (916) 734-3772
Dr. Bijay Nair, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (167) 334-4009
Dr. Brian Jonas, M.D., PHD
Sacramento, CA · $9,554 in drug and device payments (2025) · Telehealth · (916) 734-5981

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.