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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. Seong Kim, NP
Los Angeles, CA · $110 in drug and device payments (2025) · (310) 794-9718
Dr. Seong Kim, MD
Los Angeles, CA · $233 in drug and device payments (2025) · (213) 977-1214
Dr. Sepehr Rokhsar, M.D.
Los Angeles, CA · $36,308 in drug and device payments (2025) · (310) 423-0301
Dr. Shahrooz Eshaghian, M.D.
Los Angeles, CA · $4,541 in drug and device payments (2025) · Telehealth · (310) 229-3535
Dr. Sheldon Herman, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-9718
Dr. Sidney Stoll, D.O.
Los Angeles, CA · $2,885 in drug and device payments (2025) · Telehealth · (323) 489-6010
Dr. Soo Im, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 660-6200
Dr. Steven Miles, M.D.
Los Angeles, CA · $681 in drug and device payments (2025) · (424) 363-9221
Dr. Sungwon Kyung, M.D.
Los Angeles, CA · $5,962 in drug and device payments (2025) · Telehealth · (213) 977-1214
Dr. Sven De Vos, MD
Los Angeles, CA · $23,924 in drug and device payments (2025) · Telehealth · (310) 267-2756
Dr. Taras Benzar, MD
Los Angeles, CA · $2,024 in drug and device payments (2025) · (424) 535-1874
Dr. Teresa Dubernet, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Vera Kleynberg, M.D.
Los Angeles, CA · $1,527 in drug and device payments (2025) · Telehealth · (323) 965-9995
Dr. Vi Chiu, M.D., PH.D.
Los Angeles, CA · $31 in drug and device payments (2025) · (310) 582-7900
Dr. Vincent Nicchi, MD
Los Angeles, CA · $986 in drug and device payments (2025) · (323) 865-3913
Dr. Vishwanath Ganesan, MD
Los Angeles, CA · $1,960 in drug and device payments (2025) · (800) 872-2273
Dr. Wade Nishimoto, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 649-7222
Dr. Wanxing Chai-ho, M.D.
Los Angeles, CA · $2,746 in drug and device payments (2025) · Telehealth · (310) 794-4955
Dr. Warren Banta, MD
Los Angeles, CA · $6,397 in drug and device payments (2025) · Telehealth · (323) 264-0430
Dr. Yi-tsung Lu, M.D.
Los Angeles, CA · $120 in drug and device payments (2025) · (323) 409-1000
Dr. Youram Nassir, MD
Los Angeles, CA · $5,097 in drug and device payments (2025) · Telehealth · (323) 930-2324
Dr. Amir Tabatabai, M.D.
Los Gatos, CA · No drug or device payments recorded (2025) · Telehealth · (408) 358-8415
Dr. Raina Ferzoco, M.D.
Los Gatos, CA · No drug or device payments recorded (2025) · Telehealth · (408) 358-8415
Dr. Simranjit Sekhon, M.D.
Los Gatos, CA · $141 in drug and device payments (2025) · Telehealth · (408) 358-8415
Dr. Ying Cao, MD, PH.D
Los Gatos, CA · $31 in drug and device payments (2025) · Telehealth · (408) 358-8444
Dr. Fadi Nakhl, M.D.
Lynwood, CA · $2,681 in drug and device payments (2025) · Telehealth · (310) 667-4000
Dr. Halline Overby, M.D.
Lynwood, CA · $589 in drug and device payments (2025) · Telehealth · (310) 763-7486
Dr. Manuel Zevallos, MD
Lynwood, CA · $4,295 in drug and device payments (2025) · (310) 667-4000
Dr. David Austin, MD
Manhattan Beach, CA · $16 in drug and device payments (2025) · (310) 546-4599
Dr. Piyush Srivastava, MD
Marina Del Rey, CA · $15 in drug and device payments (2025) · Telehealth · (310) 463-8773
Dr. Tasha Lin, MD
Marina Del Rey, CA · $135 in drug and device payments (2025) · Telehealth · (310) 301-6211
Dr. John Patresan, MD
Martinez, CA · $170 in drug and device payments (2025) · (925) 370-5000
Dr. Lee Schwartz, M.D.
Martinez, CA · No drug or device payments recorded (2025) · (925) 768-8659
Dr. Lili Wang, M.D.
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5774
Dr. Nelson Lim, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-2062
Dr. Rakesh Bhutani, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Robert Johnson, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Amandeep Gill, M.D.
Marysville, CA · $114 in drug and device payments (2025) · Telehealth · (408) 421-2180
Dr. Hoa Nguyen, M.D.
Marysville, CA · $1,358 in drug and device payments (2025) · (530) 749-4400
Dr. Pamela Oster, M.D.
Marysville, CA · No drug or device payments recorded (2025) · (530) 749-4400
Dr. Quy Tran, M.D.
Mather, CA · $22 in drug and device payments (2025) · (916) 843-7008
Dr. Roya Sheridan, M.D.
Mather, CA · No drug or device payments recorded (2025) · Telehealth · (916) 843-7008
Dr. Juliet Kral, MD
Menlo Park, CA · $244 in drug and device payments (2025) · (650) 324-4400
Dr. Imtiaz Malik, M.D.
Merced, CA · $1,869 in drug and device payments (2025) · (209) 388-1600
Dr. Merla Puray, M.D.
Merced, CA · $1,227 in drug and device payments (2025) · Telehealth · (209) 722-5100
Dr. Pushpinderdeep Kahlon, MD
Merced, CA · No drug or device payments recorded (2025) · Telehealth · (209) 579-5628
Dr. Frank Valone, MD
Mill Valley, CA · $62 in drug and device payments (2025) · (415) 847-3965
Dr. Robert Mass, MD
Mill Valley, CA · No drug or device payments recorded (2025) · (415) 497-2225
Dr. Albert Dekker, MD.
Mission Hills, CA · $9,326 in drug and device payments (2025) · Telehealth · (818) 365-9531
Dr. Benjamin Leach, M.D.
Mission Hills, CA · $234 in drug and device payments (2025) · Telehealth · (818) 660-4700

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.