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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. Tin Hla, M.D.
San Jose, CA · $737 in drug and device payments (2025) · (408) 929-6088
Dr. Bao Lam, M.D.
San Leandro, CA · No drug or device payments recorded (2025) · (510) 483-2555
Dr. Gail Wagner, M.D.
San Leandro, CA · No drug or device payments recorded (2025) · (510) 454-1000
Dr. Kenneth Poon
San Leandro, CA · No drug or device payments recorded (2025) · Telehealth · (510) 454-2760
Dr. Ming Kuan, M.D.
San Leandro, CA · No drug or device payments recorded (2025) · (510) 454-1000
Dr. Ostap Melnyk, MD
San Leandro, CA · $54 in drug and device payments (2025) · (510) 483-2555
Dr. Ravinder Arora, MD
San Leandro, CA · $95 in drug and device payments (2025) · (510) 483-2555
Dr. Brian Dicarlo, MD
San Luis Obispo, CA · $335 in drug and device payments (2025) · Telehealth · (805) 541-8252
Dr. Daniel Lewis, M.D.
San Luis Obispo, CA · $1,455 in drug and device payments (2025) · Telehealth · (805) 543-5577
Dr. David Harrison, M.D.
San Luis Obispo, CA · No drug or device payments recorded (2025) · (805) 543-5577
Dr. Erin Chamberlain, M.D.
San Luis Obispo, CA · No drug or device payments recorded (2025) · Telehealth · (805) 543-8252
Dr. Gary Harkins, M.D.
San Luis Obispo, CA · No drug or device payments recorded (2025) · (805) 543-5577
Dr. Gorgun Akpek, M.D., M.H.S.
San Luis Obispo, CA · $7,202 in drug and device payments (2025) · Telehealth · (805) 543-5577
Dr. Joseph Cleveland
San Luis Obispo, CA · No drug or device payments recorded (2025) · Telehealth · (805) 541-8252
Dr. Levanto Schachter, D.O.
San Luis Obispo, CA · $2,371 in drug and device payments (2025) · Telehealth · (805) 541-8252
Dr. Lin Soe, MBBS, MPH, TM
San Luis Obispo, CA · $3,772 in drug and device payments (2025) · Telehealth · (805) 543-5577
Dr. Philip Marjon, M.D.
San Marcos, CA · $5,865 in drug and device payments (2025) · Telehealth · (760) 747-8935
Dr. Sujatha Murali, MD
San Marcos, CA · No drug or device payments recorded (2025) · Telehealth · (619) 528-5000
Dr. Bradley Ekstrand, M.D., PH.D.
San Mateo, CA · No drug or device payments recorded (2025) · Telehealth · (650) 341-9131
Dr. Brian Henderson, M.D.
San Mateo, CA · No drug or device payments recorded (2025) · (650) 348-0893
Dr. Elham Vosoughi, M.D.
San Mateo, CA · No drug or device payments recorded (2025) · Telehealth · (650) 341-9131
Dr. Eric Kuo, MD
San Mateo, CA · $4,733 in drug and device payments (2025) · Telehealth · (650) 696-5420
Dr. Jelena Kao, MD
San Mateo, CA · $732 in drug and device payments (2025) · Telehealth · (650) 341-9131
Dr. Jennifer Brown, M.D.
San Mateo, CA · $31 in drug and device payments (2025) · (650) 341-9131
Dr. Julian Mclain, MD
San Mateo, CA · $2,670 in drug and device payments (2025) · Telehealth · (650) 696-5420
Dr. Karen Chee, M.D.
San Mateo, CA · No drug or device payments recorded (2025) · Telehealth · (650) 341-9131
Dr. Katrina Fischer
San Mateo, CA · $1,130 in drug and device payments (2025) · Telehealth · (650) 696-4509
Dr. Kent Adler, M.D.
San Mateo, CA · No drug or device payments recorded (2025) · Telehealth · (650) 341-9131
Dr. Peter Lee, M.D
San Mateo, CA · No drug or device payments recorded (2025) · (310) 882-9389
Dr. Robert Cohen, MD
San Mateo, CA · No drug or device payments recorded (2025) · (650) 342-4357
Dr. Sirisha Tummala, MD
San Mateo, CA · $193 in drug and device payments (2025) · Telehealth · (650) 341-9131
Dr. Krista Muirhead, MD
San Rafael, CA · No drug or device payments recorded (2025) · (415) 444-2000
Dr. Lori Kim, MD
San Rafael, CA · No drug or device payments recorded (2025) · (415) 446-2500
Dr. Vinh Dao, M.D.,PH.D.
San Rafael, CA · No drug or device payments recorded (2025) · Telehealth · (415) 446-2500
Dr. Swaminathan Murugappan
San Ramon, CA · No drug or device payments recorded (2025) · (267) 992-2747
Dr. Daniel Huang, M.D.
Santa Ana, CA · $7,957 in drug and device payments (2025) · Telehealth · (714) 542-0102
Dr. Edward Alexson, M.D.
Santa Ana, CA · No drug or device payments recorded (2025) · (714) 835-4800
Dr. Nabil Phillips, M.D.
Santa Ana, CA · $115 in drug and device payments (2025) · (714) 542-9100
Dr. Alan Rosenblum, M.D.
Santa Barbara, CA · No drug or device payments recorded (2025) · (805) 569-2004
Dr. Asma Anwar, MD
Santa Barbara, CA · $86 in drug and device payments (2025) · (206) 920-8078
Dr. Chad Guenther, MD
Santa Barbara, CA · $46 in drug and device payments (2025) · Telehealth · (805) 879-0670
Dr. Frederic Kass, MD
Santa Barbara, CA · $49 in drug and device payments (2025) · Telehealth · (805) 563-0041
Dr. Gregg Newman, M.D.
Santa Barbara, CA · $257 in drug and device payments (2025) · Telehealth · (805) 681-1761
Dr. Joseph Ryan, MD
Santa Barbara, CA · $219 in drug and device payments (2025) · Telehealth · (805) 879-0670
Dr. Julian Davis, MD
Santa Barbara, CA · $210 in drug and device payments (2025) · Telehealth · (805) 630-0415
Dr. Julie Taguchi, M.D.
Santa Barbara, CA · $123 in drug and device payments (2025) · (805) 681-1761
Dr. Maira Campos, M.D.
Santa Barbara, CA · $126 in drug and device payments (2025) · Telehealth · (805) 879-0670
Dr. Mark Abate, M.D.
Santa Barbara, CA · $2,823 in drug and device payments (2025) · Telehealth · (805) 879-0670
Dr. Mohammed Abu Zaanona, MD
Santa Barbara, CA · $156 in drug and device payments (2025) · Telehealth · (805) 879-0670
Dr. Novejot Sekhon, M.D.
Santa Barbara, CA · No drug or device payments recorded (2025) · (805) 563-5800

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.