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. Nitin Rohatgi, M.D.
Sacramento, CA · $169,589 in drug and device payments (2025) · Telehealth · (916) 453-3300
Dr. Pat Carinugan, FNP
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Paul Kaesberg, M.D.
Sacramento, CA · $20,102 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Primo Lara, M.D.
Sacramento, CA · $138 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Rashmi Verma, M.D.
Sacramento, CA · $68 in drug and device payments (2025) · Telehealth · (916) 734-3772
Dr. Rasmus Hoeg, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-5981
Dr. Richard Guy, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-3772
Dr. Robert O'donnell, M.D., PH.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Ronald Wisdom, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3772
Dr. Scott Christensen, M.D.
Sacramento, CA · $56,731 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Shiruyeh Schokrpur, MD, PHD
Sacramento, CA · $3,583 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Sovijja Pou, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Srinivas Gummaraju, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (530) 749-4400
Dr. Stephen Wang, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 688-2000
Dr. Tatini Datta
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Tennyson Jellins, MD, MS
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Theodore Wun, M.D.
Sacramento, CA · $1,401 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Tianhong Li, MD,PH.D
Sacramento, CA · $4,439 in drug and device payments (2025) · Telehealth · (916) 734-5959
Dr. Tim Grennan, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Brenda Chiang
Salinas, CA · $638 in drug and device payments (2025) · (831) 755-1701
Dr. Geetha Varma, M.D
Salinas, CA · $1,473 in drug and device payments (2025) · Telehealth · (831) 755-1701
Dr. Hong Zhao, M.D.
Salinas, CA · $996 in drug and device payments (2025) · Telehealth · (831) 755-1701
Dr. Shehzad Aziz, M.D.
Salinas, CA · $1,734 in drug and device payments (2025) · Telehealth · (831) 755-1701
Dr. Brian Lewis, MD
San Anselmo, CA · $18 in drug and device payments (2025) · (415) 454-2676
Dr. David Lakes, MD
San Anselmo, CA · No drug or device payments recorded (2025) · (415) 444-2000
Dr. Cinderella Radu, MD
San Bernardino, CA · No drug or device payments recorded (2025) · Telehealth · (909) 886-1900
Dr. Dennis Hilliard, M.D.
San Bernardino, CA · $934 in drug and device payments (2025) · (909) 886-6806
Dr. Ming-swang Lok, MD
San Bernardino, CA · $18 in drug and device payments (2025) · (909) 982-4252
Dr. Rajiv Malik, M.D.
San Bernardino, CA · $3,384 in drug and device payments (2025) · (909) 886-6806
Dr. Samir Kubba, M.D.
San Bernardino, CA · $5,076 in drug and device payments (2025) · (909) 886-6806
Dr. Gabriel Carabulea, M.D.
San Clemente, CA · $189 in drug and device payments (2025) · (714) 466-0787
Dr. Adam Burgoyne, M.D., PH.D.
San Diego, CA · $13,322 in drug and device payments (2025) · Telehealth · (619) 471-9186
Dr. Aditya Sarvaria, MD
San Diego, CA · $4,317 in drug and device payments (2025) · Telehealth · (619) 849-4469
Dr. Ah-reum Jeong, MD
San Diego, CA · $85 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Alfred Saleh, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 637-7888
Dr. Alyssa Beck, M.D.
San Diego, CA · $278 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Amanda Kagan, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (800) 926-8273
Dr. Andre Jung, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 642-3356
Dr. Andrew Hampshire, M.D.
San Diego, CA · $2,889 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Annette Von Drygalski, MD
San Diego, CA · $50,070 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Ann Moeller, M.D.
San Diego, CA · $1,102 in drug and device payments (2025) · Telehealth · (858) 939-6622
Dr. Caitlin Costello, M.D.
San Diego, CA · $24,042 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Catriona Jamieson, M.D./PH.D
San Diego, CA · No drug or device payments recorded (2025) · (858) 822-6276
Dr. Charles Kossman, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 287-9910
Dr. Charles Redfern, M.D.
San Diego, CA · $384 in drug and device payments (2025) · Telehealth · (858) 637-7888
Dr. Christopher Larson, M.D.
San Diego, CA · $149 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Chung-jiah Chen, MD
San Diego, CA · $29 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Collin Zimmerman, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 528-5713
Dr. Craig Norris, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 532-7309
Dr. Dana Glenn, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 939-6622

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.