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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. Eknath Deo, M.D., F.A.C.P.
Long Beach, CA · $16 in drug and device payments (2025) · (562) 997-4070
Dr. Esha Sachdev, MD
Long Beach, CA · $667 in drug and device payments (2025) · Telehealth · (562) 933-1877
Dr. Farah Shah, MD
Long Beach, CA · $34 in drug and device payments (2025) · (562) 933-1877
Dr. Gordon Mclaren, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Helen Ma, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Jonathan Blitzer, MD
Long Beach, CA · $587 in drug and device payments (2025) · Telehealth · (562) 933-1877
Dr. Kiem Liem, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · Telehealth · (562) 430-5900
Dr. Krushangi Patel, M.D.
Long Beach, CA · $253 in drug and device payments (2025) · Telehealth · (562) 590-0345
Dr. Lihong Wu, M.D.
Long Beach, CA · $117 in drug and device payments (2025) · Telehealth · (562) 590-0345
Dr. Mark Ngo, M.D.
Long Beach, CA · $541 in drug and device payments (2025) · Telehealth · (562) 590-0345
Dr. Milan Sheth, MD
Long Beach, CA · $2,410 in drug and device payments (2025) · Telehealth · (562) 933-1877
Dr. Nilesh Vora, M.D.
Long Beach, CA · $14,481 in drug and device payments (2025) · Telehealth · (562) 933-1877
Dr. Padmini Iyer, M.D
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-5748
Dr. Peter Ngo
Long Beach, CA · $235 in drug and device payments (2025) · Telehealth · (562) 590-0345
Dr. Sassan Farjami, M.D.
Long Beach, CA · $10,402 in drug and device payments (2025) · Telehealth · (562) 590-0345
Dr. Mario Curti, M.D.
Los Alamitos, CA · $2,472 in drug and device payments (2025) · Telehealth · (562) 598-9745
Dr. Minh Huynh, M.D.
Los Alamitos, CA · No drug or device payments recorded (2025) · (562) 598-9745
Dr. Nihal Abdulla, MD
Los Alamitos, CA · $9,150 in drug and device payments (2025) · Telehealth · (562) 735-0602
Dr. Vu Phan, MD
Los Alamitos, CA · $12,548 in drug and device payments (2025) · Telehealth · (562) 735-0602
Dr. Aaron Burkenroad, MD
Los Angeles, CA · $3,447 in drug and device payments (2025) · Telehealth · (213) 988-8340
Dr. Adrese Kandahari, M.D.
Los Angeles, CA · $1,310 in drug and device payments (2025) · (310) 231-2121
Dr. Akil Merchant, M.D.
Los Angeles, CA · $77,221 in drug and device payments (2025) · Telehealth · (310) 423-0161
Dr. Alexander Song, MD
Los Angeles, CA · $5,802 in drug and device payments (2025) · Telehealth · (213) 977-1214
Dr. Allen Bredt, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Allen Yang, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 865-3105
Dr. Ann Mohrbacher, M.D.
Los Angeles, CA · $4,543 in drug and device payments (2025) · Telehealth · (323) 442-5100
Dr. Anthony Bejjani, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-6301
Dr. Antoni Ribas, MD
Los Angeles, CA · $3,511 in drug and device payments (2025) · Telehealth · (310) 206-3928
Dr. Arash Naeim, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-6301
Dr. Arati Chand, M.D.
Los Angeles, CA · $53,842 in drug and device payments (2025) · Telehealth · (323) 847-5857
Dr. Aryeh Edelist, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0631
Dr. Austin Ma, MD
Los Angeles, CA · $998 in drug and device payments (2025) · Telehealth · (323) 264-0430
Dr. Bartosz Chmielowski, MD, PHD
Los Angeles, CA · $7,768 in drug and device payments (2025) · Telehealth · (310) 829-5471
Dr. Becky Miller, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 854-5841
Dr. Byung Lee, D.O
Los Angeles, CA · $4,951 in drug and device payments (2025) · Telehealth · (323) 264-0430
Dr. Casey O'connell, M.D.
Los Angeles, CA · $10,374 in drug and device payments (2025) · Telehealth · (323) 865-3105
Dr. Caspian Oliai, M.D.
Los Angeles, CA · $3,021 in drug and device payments (2025) · Telehealth · (310) 794-4955
Dr. Cecilia Kim, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 268-3622
Dr. Charles Forscher, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-8045
Dr. Charles Haskell, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-9718
Dr. Cherry Au
Los Angeles, CA · $942 in drug and device payments (2025) · (800) 872-2273
Dr. Christos Emmanouilides, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0631
Dr. Clan Hahn, M.D.
Los Angeles, CA · $6,244 in drug and device payments (2025) · (213) 277-1700
Dr. Danielle Sterrenberg, M.D.
Los Angeles, CA · $31 in drug and device payments (2025) · Telehealth · (323) 865-0563
Dr. Daniel Shin, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-4955
Dr. David Berz, MD, PHD, MPH
Los Angeles, CA · $1,243 in drug and device payments (2025) · Telehealth · (424) 535-1874
Dr. David Bolos
Los Angeles, CA · $1,021 in drug and device payments (2025) · (310) 825-7375
Dr. David Chang, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-5280
Dr. David Masiello, M.D.
Los Angeles, CA · $3,521 in drug and device payments (2025) · Telehealth · (617) 320-9510
Dr. David Oveisi, MD
Los Angeles, CA · $17,206 in drug and device payments (2025) · Telehealth · (310) 423-1160

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.