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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. Amy Wang, MD
Glendale, CA · $3,569 in drug and device payments (2025) · (818) 637-7611
Dr. Boris Bagdasarian, D.O.
Glendale, CA · $7,192 in drug and device payments (2025) · Telehealth · (818) 409-0105
Dr. Erin-elizabeth Roffe
Glendale, CA · No drug or device payments recorded (2025) · (818) 507-4732
Dr. Jerry Wada, M.D.
Glendale, CA · No drug or device payments recorded (2025) · (818) 409-0105
Dr. John Gunnell
Glendale, CA · No drug or device payments recorded (2025) · (818) 247-5440
Dr. Kalust Ucar, M.D.
Glendale, CA · $253 in drug and device payments (2025) · Telehealth · (818) 637-7611
Dr. Mercedes Maruscak, N.P.
Glendale, CA · $24 in drug and device payments (2025) · (818) 637-7611
Dr. Mihran Shirinian, M.D.
Glendale, CA · $542 in drug and device payments (2025) · Telehealth · (818) 543-7574
Dr. Saro Kasparian, M.D.
Glendale, CA · $6,164 in drug and device payments (2025) · Telehealth · (818) 409-0105
Dr. Zara Sipan, PA-C
Glendale, CA · $365 in drug and device payments (2025) · Telehealth · (818) 637-7611
Dr. Naveed Khan, MD
Glendora, CA · $75 in drug and device payments (2025) · Telehealth · (626) 225-2111
Dr. David Campbell, M.D.
Grass Valley, CA · No drug or device payments recorded (2025) · Telehealth · (530) 274-6677
Dr. Jamie Hung, D.O.
Grass Valley, CA · $235 in drug and device payments (2025) · Telehealth · (530) 274-6677
Dr. Alex Metzger, M.D.
Greenbrae, CA · $119 in drug and device payments (2025) · Telehealth · (415) 925-5000
Dr. Bhupinder Chatrath, MD
Hanford, CA · $409 in drug and device payments (2025) · (559) 584-6000
Dr. Lara Durna, MD
Harbor City, CA · No drug or device payments recorded (2025) · (310) 325-5111
Dr. Shu-chieng Hsieh, MD
Harbor City, CA · No drug or device payments recorded (2025) · Telehealth · (310) 325-5111
Dr. Tracy Kim, MD
Harbor City, CA · No drug or device payments recorded (2025) · (310) 325-5111
Dr. Grant Goodman, MD
Hayward, CA · No drug or device payments recorded (2025) · (510) 784-4000
Dr. Howard Kleckner, MD
Hayward, CA · No drug or device payments recorded (2025) · (510) 784-4000
Dr. Michael Jensen-akula, MD
Hayward, CA · No drug or device payments recorded (2025) · (510) 784-4000
Dr. Neha Desouza, MD
Hayward, CA · $4,155 in drug and device payments (2025) · Telehealth · (510) 264-0300
Dr. Qaiser Niaz, MD
Hayward, CA · $4,090 in drug and device payments (2025) · Telehealth · (510) 264-0300
Dr. James Tsai, M.D.
Hemet, CA · $204 in drug and device payments (2025) · Telehealth · (951) 652-3333
Dr. Kishore Sehgal, M.D.
Hemet, CA · $2,962 in drug and device payments (2025) · (951) 766-6460
Dr. Walter Tsang, MD
Highland, CA · $4,786 in drug and device payments (2025) · Telehealth · (909) 862-1191
Dr. Carol Mei, M.D.
Hollister, CA · $81 in drug and device payments (2025) · (781) 340-0735
Dr. An Nguyen, M.D.
Huntington Beach, CA · $41 in drug and device payments (2025) · Telehealth · (714) 252-9415
Dr. Danny Nguyen, M.D.
Huntington Beach, CA · $10,850 in drug and device payments (2025) · Telehealth · (714) 252-9415
Dr. David Burtzo, M.D.
Huntington Beach, CA · No drug or device payments recorded (2025) · (714) 861-1000
Dr. Eleonor Quan, M.D.
Huntington Beach, CA · $19 in drug and device payments (2025) · (714) 252-9415
Dr. Houshang Moayeri, MD
Huntington Beach, CA · No drug or device payments recorded (2025) · (714) 842-7779
Dr. Karlos Oregel, M.D.
Huntington Beach, CA · $265 in drug and device payments (2025) · Telehealth · (714) 252-9415
Dr. Larry Weisenthal, MD., PHD.
Huntington Beach, CA · No drug or device payments recorded (2025) · (714) 596-2100
Dr. Luke Chen, M.D.
Huntington Beach, CA · $2,486 in drug and device payments (2025) · Telehealth · (714) 252-9415
Dr. Mohamad Barakat
Huntington Beach, CA · $235 in drug and device payments (2025) · Telehealth · (714) 252-9415
Dr. Nishan Tchekmedyian, MD
Huntington Beach, CA · No drug or device payments recorded (2025) · Telehealth · (714) 252-9415
Dr. Umair Ghani, M.D.
Huntington Beach, CA · $223 in drug and device payments (2025) · Telehealth · (714) 861-1000
Dr. Yaser Homsi, M.D.
Huntington Beach, CA · $66 in drug and device payments (2025) · Telehealth · (714) 252-9415
Dr. Doris Lyonga, MD
Inglewood, CA · No drug or device payments recorded (2025) · (310) 673-9604
Dr. Robert Levin, MD
Inglewood, CA · $1,692 in drug and device payments (2025) · Telehealth · (310) 644-8400
Dr. Titfany Wang, MD
Inglewood, CA · No drug or device payments recorded (2025) · (800) 871-8890
Dr. Charisma Mylavarapu, D.O.
Irvine, CA · $568 in drug and device payments (2025) · Telehealth · (888) 333-4673
Dr. David Lou, M.D., PH.D.
Irvine, CA · $96 in drug and device payments (2025) · (949) 932-5000
Dr. David Xu, MD
Irvine, CA · $91 in drug and device payments (2025) · Telehealth · (949) 653-2959
Dr. Hyun Don Yun, MD
Irvine, CA · $1,222 in drug and device payments (2025) · (949) 414-9337
Dr. Lisa Lee, M.D.
Irvine, CA · $50 in drug and device payments (2025) · Telehealth · (949) 671-4673
Dr. Nader Kashani, MD
Irvine, CA · $371 in drug and device payments (2025) · Telehealth · (949) 777-5970
Dr. Nerses Tchekmedyian, M.D.
Irvine, CA · $103 in drug and device payments (2025) · Telehealth · (949) 671-4673
Dr. Rafi Ahmed, MD
Irvine, CA · $1,965 in drug and device payments (2025) · Telehealth · (949) 764-4060

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.