HealthcareDiscovery.AI / Doctors / California / Hematology & Oncology

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. Ernest Lo, MD
Cameron Park, CA · $1,838 in drug and device payments (2025) · Telehealth · (530) 676-6600
Dr. Rashmi Ramasubbaiah, MD
Cameron Park, CA · $412 in drug and device payments (2025) · (530) 323-6600
Dr. Tsuong Tsai, MD
Cameron Park, CA · No drug or device payments recorded (2025) · (530) 676-6600
Dr. Anne Uyei, MD
Campbell, CA · No drug or device payments recorded (2025) · (408) 376-2300
Dr. Babak Rajabi, MD
Carmichael, CA · $2,949 in drug and device payments (2025) · Telehealth · (916) 962-1544
Dr. Gregory Blair, M.D.
Carmichael, CA · $1,374 in drug and device payments (2025) · (916) 961-0258
Dr. Hanh La, M.D.
Carmichael, CA · $613 in drug and device payments (2025) · Telehealth · (916) 863-8750
Dr. John Kailath, M.D.
Carmichael, CA · $541 in drug and device payments (2025) · Telehealth · (916) 961-0258
Dr. Navneet Virk, MD
Carmichael, CA · $633 in drug and device payments (2025) · Telehealth · (916) 961-0258
Dr. Ram Lalchandani, M.D.
Carmichael, CA · $429 in drug and device payments (2025) · Telehealth · (916) 961-0258
Dr. Shahzad Siddique, MD
Carmichael, CA · $57 in drug and device payments (2025) · Telehealth · (916) 536-3540
Dr. Kun Xiao, MD MPH
Castro Valley, CA · No drug or device payments recorded (2025) · Telehealth · (510) 204-8383
Dr. Mahboub Noori, MD
Castro Valley, CA · $336 in drug and device payments (2025) · Telehealth · (833) 444-7622
Dr. Suguna Chirla, M.D
Castro Valley, CA · $99 in drug and device payments (2025) · (510) 247-9227
Dr. Usha Sunkara, M.D,
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 888-0657
Dr. Babak Baseri, M.D.
Cerritos, CA · $6,646 in drug and device payments (2025) · Telehealth · (562) 735-3226
Dr. Farah Quyyumi, M.D.
Cerritos, CA · $29 in drug and device payments (2025) · Telehealth · (562) 735-3226
Dr. Foluso Ogunleye, MD
Cerritos, CA · $2,927 in drug and device payments (2025) · Telehealth · (562) 735-3226
Dr. Hiroshi Yamagata, MD
Cerritos, CA · $4,341 in drug and device payments (2025) · (562) 735-3226
Dr. John Khoury, MD
Cerritos, CA · $7,209 in drug and device payments (2025) · Telehealth · (562) 735-3226
Dr. Juan Sanchez, MD
Cerritos, CA · $5,004 in drug and device payments (2025) · Telehealth · (562) 735-3226
Dr. Paul La Porte, M.D., PH.D.
Cerritos, CA · $1,472 in drug and device payments (2025) · Telehealth · (562) 735-3226
Dr. Wilbur Montana, DO
Cerritos, CA · $273 in drug and device payments (2025) · Telehealth · (562) 735-3226
Dr. Debra Garley, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 893-2323
Dr. John Hayward, MD
Chico, CA · No drug or device payments recorded (2025) · (530) 899-9000
Dr. Nicole Whitlatch, MD
Chico, CA · No drug or device payments recorded (2025) · Telehealth · (530) 332-4530
Dr. Rubens Costa Filho, MD
Chico, CA · $1,888 in drug and device payments (2025) · Telehealth · (530) 332-4700
Dr. Sam Mazj, MD
Chico, CA · $15,630 in drug and device payments (2025) · Telehealth · (530) 893-2323
Dr. Sufana Shikdar, MD, MPH
Chico, CA · $371 in drug and device payments (2025) · Telehealth · (530) 332-7300
Dr. William Bonis, MD
Chico, CA · $563 in drug and device payments (2025) · Telehealth · (530) 332-3890
Dr. Yuan Ying, M.D,
Chico, CA · $324 in drug and device payments (2025) · Telehealth · (530) 332-4700
Dr. Aparajit Venkateswaran, MD
Chula Vista, CA · $4,783 in drug and device payments (2025) · Telehealth · (619) 329-5571
Dr. Ignacio Iturbe, M.D.
Chula Vista, CA · $3,073 in drug and device payments (2025) · (619) 745-1031
Dr. Kenneth Johnson, MD
Chula Vista, CA · $1,772 in drug and device payments (2025) · (619) 482-8430
Dr. Kousay Alkourainy, M.D.
Chula Vista, CA · No drug or device payments recorded (2025) · (619) 425-2080
Dr. Mariela Macias, MD
Chula Vista, CA · $1,237 in drug and device payments (2025) · Telehealth · (858) 393-6622
Dr. Marilyn Norton, MD
Chula Vista, CA · $1,403 in drug and device payments (2025) · (619) 482-8430
Dr. Ramesh Moolani, M.D.
Chula Vista, CA · $5,111 in drug and device payments (2025) · (619) 745-1031
Dr. Sheila Kalathil, M.D.
Chula Vista, CA · $1,536 in drug and device payments (2025) · Telehealth · (858) 294-4146
Dr. Constance Stoehr, M.D.
Clovis, CA · $2,484 in drug and device payments (2025) · Telehealth · (559) 387-1900
Dr. Jaspreet Kaur, MD
Clovis, CA · $378 in drug and device payments (2025) · Telehealth · (559) 387-1900
Dr. Li Li, M.D.
Clovis, CA · $66 in drug and device payments (2025) · Telehealth · (559) 387-1900
Dr. Michael Moffett, M.D.
Clovis, CA · $360 in drug and device payments (2025) · Telehealth · (559) 299-6600
Dr. Mohammed Bukari, MD
Clovis, CA · $10,510 in drug and device payments (2025) · Telehealth · (559) 387-1900
Dr. Omer Ilyas, M.D.
Clovis, CA · $3,794 in drug and device payments (2025) · Telehealth · (559) 387-1900
Dr. Sanjay Hinduja, MD
Clovis, CA · $2,101 in drug and device payments (2025) · Telehealth · (559) 387-1900
Dr. Uzair Chaudhary, M.D.
Clovis, CA · $49,204 in drug and device payments (2025) · Telehealth · (559) 387-1900
Dr. Romulo Santos
Colma, CA · No drug or device payments recorded (2025) · (415) 850-2536
Dr. Siamak Saadat, M.D.
Colton, CA · $83,238 in drug and device payments (2025) · (909) 580-2775
Dr. Beverly Mcleod, MD
Concord, CA · No drug or device payments recorded (2025) · (925) 674-2110

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

Related

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
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.