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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. Deanna Felix, NP
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 301-8860
Dr. Deborah Wong, M.D., PH.D.
Los Angeles, CA · $2,446 in drug and device payments (2025) · Telehealth · (310) 794-4955
Dr. Denise Oseguera, NP
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-6301
Dr. Dennis Slamon, MD
Los Angeles, CA · $17,852 in drug and device payments (2025) · (310) 825-5193
Dr. Edward Garon, MD
Los Angeles, CA · $106,966 in drug and device payments (2025) · Telehealth · (310) 829-5471
Dr. Elizabeth Pan
Los Angeles, CA · $61 in drug and device payments (2025) · Telehealth · (323) 226-2111
Dr. Ellsworth Grant, M.D
Los Angeles, CA · $4,118 in drug and device payments (2025) · Telehealth · (213) 481-3948
Dr. Eric Mcgary, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Eric Tam, MD
Los Angeles, CA · $1,492 in drug and device payments (2025) · Telehealth · (323) 865-3105
Dr. Fairooz Kabbinavar, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-3921
Dr. Fukai Chuang, M.D.
Los Angeles, CA · $31 in drug and device payments (2025) · Telehealth · (310) 825-5756
Dr. Galen Gao
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-9111
Dr. Gary Buchschacher Jr., MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Gary Schiller, MD
Los Angeles, CA · $24,285 in drug and device payments (2025) · Telehealth · (310) 825-5513
Dr. George Yaghmour
Los Angeles, CA · $402,882 in drug and device payments (2025) · Telehealth · (323) 865-3950
Dr. Ghassan Al-jazayrly, M.D.
Los Angeles, CA · $117 in drug and device payments (2025) · (323) 660-6200
Dr. Gino In, MD
Los Angeles, CA · $10,385 in drug and device payments (2025) · Telehealth · (323) 865-3105
Dr. Gottfried Konecny, MD
Los Angeles, CA · $70,206 in drug and device payments (2025) · Telehealth · (310) 206-1214
Dr. Grace Cherry, NP
Los Angeles, CA · $9,268 in drug and device payments (2025) · (310) 794-1092
Dr. Grant Jirka, MD
Los Angeles, CA · $3,573 in drug and device payments (2025) · (323) 865-3823
Dr. Haley Castiglione, N.P.
Los Angeles, CA · $53 in drug and device payments (2025) · (310) 825-6301
Dr. Hannah Lee, MD
Los Angeles, CA · $227 in drug and device payments (2025) · Telehealth · (310) 423-1160
Dr. Hao Zhang, M.D.
Los Angeles, CA · $7,468 in drug and device payments (2025) · Telehealth · (323) 264-0430
Dr. Howard Liebman, M.D.
Los Angeles, CA · $13,574 in drug and device payments (2025) · (323) 865-3105
Dr. Hung Tran
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 361-4100
Dr. Iman Abdalla, MD
Los Angeles, CA · $350 in drug and device payments (2025) · Telehealth · (323) 783-4011
Dr. Inderjit Mehmi, M.D.
Los Angeles, CA · $49,010 in drug and device payments (2025) · Telehealth · (310) 231-2121
Dr. Jason Chan, M.D. PH.D.
Los Angeles, CA · $296 in drug and device payments (2025) · Telehealth · (310) 423-8530
Dr. Jason Ho, M.D.
Los Angeles, CA · $8,182 in drug and device payments (2025) · Telehealth · (213) 977-1214
Dr. Jeffrey Lin, MD PHD
Los Angeles, CA · No drug or device payments recorded (2025) · (267) 648-3417
Dr. Jeffrey Weisz, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Jennifer Gansert, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0631
Dr. Jennifer Malin, MD, PHD
Los Angeles, CA · $21,485 in drug and device payments (2025) · (310) 478-3711
Dr. Jenny Zhou, M.D.
Los Angeles, CA · $217 in drug and device payments (2025) · (323) 865-3000
Dr. Joanne Schottinger, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Joel Hecht, MD
Los Angeles, CA · $7,861 in drug and device payments (2025) · Telehealth · (310) 586-2097
Dr. John Glaspy, MD
Los Angeles, CA · $72 in drug and device payments (2025) · Telehealth · (310) 794-4955
Dr. John Hu, M.D.
Los Angeles, CA · $4,002 in drug and device payments (2025) · Telehealth · (323) 865-3823
Dr. John Lee, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 794-7700
Dr. John Shen, M.D.
Los Angeles, CA · $3,753 in drug and device payments (2025) · (818) 995-8044
Dr. John Timmerman, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 794-5511
Dr. Joomee Shim
Los Angeles, CA · $629 in drug and device payments (2025) · Telehealth · (323) 865-3105
Dr. Jorge Nieva, M.D.
Los Angeles, CA · $23,456 in drug and device payments (2025) · Telehealth · (323) 865-3105
Dr. Joseph Nimoy, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Joshua Sasine, M.D.
Los Angeles, CA · $163 in drug and device payments (2025) · Telehealth · (310) 206-6909
Dr. Justin Wayne Tiulim, M.D.
Los Angeles, CA · $617 in drug and device payments (2025) · Telehealth · (323) 409-1000
Dr. Karissa Britten, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 888-8680
Dr. Karrune Woan
Los Angeles, CA · $80 in drug and device payments (2025) · Telehealth · (323) 865-0060
Dr. Kevin Kelly, M.D.
Los Angeles, CA · $77,369 in drug and device payments (2025) · Telehealth · (323) 865-3950
Dr. Kristopher Wentzel, M.D.
Los Angeles, CA · $20 in drug and device payments (2025) · Telehealth · (323) 226-7556

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.