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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. Steven Yu, MD
Fountain Valley, CA · $6,462 in drug and device payments (2025) · Telehealth · (714) 698-0300
Dr. Amit Arora, M.D.
Fremont, CA · $184 in drug and device payments (2025) · (510) 248-3000
Dr. Bogdan Eftimie, M.D.
Fremont, CA · $1,100 in drug and device payments (2025) · Telehealth · (510) 248-1600
Dr. Carlton Scharman
Fremont, CA · No drug or device payments recorded (2025) · Telehealth · (510) 797-1111
Dr. Dan Wong, MD
Fremont, CA · No drug or device payments recorded (2025) · (510) 795-3000
Dr. David Cheng, M.D
Fremont, CA · No drug or device payments recorded (2025) · (510) 791-1115
Dr. Huan Ha, M.D.
Fremont, CA · $503 in drug and device payments (2025) · Telehealth · (510) 498-2335
Dr. Huichung Ling, M.D.
Fremont, CA · No drug or device payments recorded (2025) · (510) 248-3000
Dr. Matthew Tenold, MD
Fremont, CA · No drug or device payments recorded (2025) · Telehealth · (510) 797-1111
Dr. Peter Deck, MD
Fremont, CA · No drug or device payments recorded (2025) · (510) 795-3000
Dr. Salimah Valliani, M.D.
Fremont, CA · No drug or device payments recorded (2025) · Telehealth · (510) 248-3000
Dr. Amandeep Gill, M.D
French Camp, CA · $1,162 in drug and device payments (2025) · Telehealth · (209) 468-6175
Dr. Abdul Haseeb, M.D.
Fresno, CA · $20,005 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Anantanarayan Padmanabhan, M.D.
Fresno, CA · No drug or device payments recorded (2025) · (559) 326-1222
Dr. Anita Xavier, MD
Fresno, CA · No drug or device payments recorded (2025) · (559) 228-5327
Dr. Brandy Box-noriega, MD
Fresno, CA · No drug or device payments recorded (2025) · Telehealth · (559) 448-4500
Dr. Cathy Zhang, MD
Fresno, CA · $615 in drug and device payments (2025) · (559) 387-1909
Dr. Christopher Perkins, MD
Fresno, CA · $28 in drug and device payments (2025) · (559) 438-7390
Dr. David Koster, M.D.
Fresno, CA · No drug or device payments recorded (2025) · (559) 326-1238
Dr. Dexter Estrada, M.D.
Fresno, CA · $867 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Dina Ibrahim, M.D
Fresno, CA · $3,899 in drug and device payments (2025) · Telehealth · (559) 554-2100
Dr. Ellie Chan, M.D.
Fresno, CA · No drug or device payments recorded (2025) · Telehealth · (559) 256-9680
Dr. Gabriel Rivera, M.D.
Fresno, CA · No drug or device payments recorded (2025) · Telehealth · (559) 448-4500
Dr. Grace Inouye, MD
Fresno, CA · No drug or device payments recorded (2025) · (559) 448-4500
Dr. Haifaa Abdulhaq, MD
Fresno, CA · $92,626 in drug and device payments (2025) · Telehealth · (559) 387-1900
Dr. John Reinsch, MD
Fresno, CA · No drug or device payments recorded (2025) · (559) 448-4500
Dr. Joseph Pascuzzo, DO
Fresno, CA · $969 in drug and device payments (2025) · (559) 326-1222
Dr. Kanchana Anand, MD
Fresno, CA · $651 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Klaus Hoffmann, MD
Fresno, CA · No drug or device payments recorded (2025) · (559) 431-0995
Dr. Leonard Hackett, M.D.
Fresno, CA · $732 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Marshall Flam, M.D.
Fresno, CA · No drug or device payments recorded (2025) · (559) 447-4949
Dr. Nguyen-huong Doan, MD
Fresno, CA · $1,045 in drug and device payments (2025) · (599) 499-6550
Dr. Omid Saeed Tehrani, M.D., PH.D,
Fresno, CA · $1,853 in drug and device payments (2025) · (559) 256-9680
Dr. Peter Wittlinger, M.D.
Fresno, CA · No drug or device payments recorded (2025) · (559) 447-4949
Dr. Prabhjot Bhinder, M.D.
Fresno, CA · $96 in drug and device payments (2025) · (559) 448-4470
Dr. Rabia Parveez, MD
Fresno, CA · $1,507 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Ravi Rao, MD
Fresno, CA · $655 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Sachin Gupta, M.D.
Fresno, CA · $7,457 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Steven Hager, D.O.
Fresno, CA · $14,026 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Tiffany Seto
Fresno, CA · $303 in drug and device payments (2025) · Telehealth · (559) 448-4500
Dr. Vajeeha Tabassum, M.D
Fresno, CA · $3,210 in drug and device payments (2025) · (559) 256-9680
Dr. V. Reddy Avula, MD
Fresno, CA · No drug or device payments recorded (2025) · (559) 497-8500
Dr. William Jawien, MD
Fresno, CA · $1,673 in drug and device payments (2025) · Telehealth · (559) 326-1222
Dr. Monica Lee, M.D.
Fullerton, CA · $6,691 in drug and device payments (2025) · Telehealth · (714) 446-5900
Dr. Roy Panares, MD
Fullerton, CA · $1,763 in drug and device payments (2025) · Telehealth · (714) 446-5900
Dr. Steven Kim, MD
Fullerton, CA · $2,484 in drug and device payments (2025) · Telehealth · (714) 446-5900
Dr. William Lawler, MD
Fullerton, CA · $187 in drug and device payments (2025) · (714) 446-5900
Dr. Yung Lyou, M.D., PH.D.
Fullerton, CA · $7,637 in drug and device payments (2025) · Telehealth · (714) 446-5900
Dr. Lynne Bui, M.D.
Gilroy, CA · $1,461 in drug and device payments (2025) · Telehealth · (408) 384-9284
Dr. Ronald Yanagihara, M.D.
Gilroy, CA · $366 in drug and device payments (2025) · (408) 847-6191

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.