HealthcareDiscovery.AI / Doctors / California / Medical Oncology

Medical Oncology in California

Data updated monthly · Last refresh August 2026

447 Medical Oncology providers practice in California, including 271 (61%) offering telehealth. The largest concentration is in Stanford. Profiles include Medicare quality scores where available.

447providers
271telehealth
Stanfordtop city

Medical Oncology providers by city in California

Stanford77 providers
San Francisco52 providers
Duarte46 providers
Los Angeles38 providers
Palo Alto17 providers
San Diego14 providers
San Jose11 providers
Sacramento11 providers

Highest rated Medical Oncology providers in California

Dr. Susan O'brien, M.D.
Orange, CA · Quality score 100/100 · Telehealth · (714) 456-8000
Dr. Muneeb Choudry, M.D.
Escondido, CA · Quality score 100/100 · Telehealth · (760) 740-2715
Dr. Priya Kumaravelu, MD
San Jose, CA · Quality score 100/100 · Telehealth · (650) 498-6000
Dr. Jennifer Valerin, M.D.
Orange, CA · Quality score 100/100 · Telehealth · (714) 456-8000
Dr. Miguel Quirch, MD
Los Angeles, CA · Quality score 100/100 · Telehealth · (213) 481-3948
Dr. Thomas Reynolds, MD
Montebello, CA · Quality score 100/100 · (323) 278-4400
Dr. Edna Flores, M.D.
La Jolla, CA · Quality score 100/100 · Telehealth · (858) 552-1410
Dr. Rupali Nabar, MD
Huntington Beach, CA · Quality score 100/100 · Telehealth · (714) 378-4920
Dr. Kambiz Afrasiabi, M.D.
Anaheim, CA · Quality score 100/100 · Telehealth · (714) 827-9797
Dr. Melissa Cohen, M.D.
Simi Valley, CA · Quality score 100/100 · Telehealth · (805) 583-0110
Dr. Casie Shenoy, M.D.
Sacramento, CA · Quality score 100/100 · Telehealth · (916) 734-2011
Dr. Aman Chauhan, MD
San Francisco, CA · Quality score 100/100 · Telehealth · (415) 353-9888
Dr. Matthew Lee, MD
Duarte, CA · Quality score 100/100 · Telehealth · (800) 826-4673
Dr. Edward Mcclay, M.D.
San Marcos, CA · Quality score 100/100 · (760) 747-8935
Dr. Achala Doraiswamy, MD
Murrieta, CA · Quality score 100/100 · Telehealth · (760) 733-9191
Dr. Farshid Dayyani, M.D., PH.D.
Orange, CA · Quality score 100/100 · Telehealth · (714) 456-8000
Dr. Seung-yil Song, M.D.
San Diego, CA · Quality score 100/100 · (858) 571-2811
Dr. Varun Monga, MBBS, MD
San Francisco, CA · Quality score 99/100 · Telehealth · (415) 353-7151
Dr. Howard West, MD
Duarte, CA · Quality score 99/100 · (626) 256-4673
Dr. Ravi Salgia, MD,PHD
Duarte, CA · Quality score 99/100 · Telehealth · (626) 218-3712

Common questions

How many Medical Oncology providers are in California?

There are 447 Medical Oncology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.

Do Medical Oncology providers in California offer telehealth?

Yes. 271 of the 447 Medical Oncology providers in California (about 61%) report offering telehealth services in CMS data.

Which cities in California have the most Medical Oncology providers?

Stanford (77), San Francisco (52), Duarte (46) have the highest concentration of Medical Oncology providers in California.

Where does this data come from?

Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files, including MIPS quality scores where available. The directory refreshes monthly.

Related reading on HealthcareDiscovery.AI

Search all 447 in the directory Ask Zach for help choosing

Related

Sources: NPPES (CMS), Doctors and Clinicians national files, MIPS. Updated monthly. This directory is informational and not medical advice. Are you a Medical Oncology in California? Get featured.