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ModernDoc · Doctor discovery

Find a doctor in Ontario, CA.

Start with a specialty and practice location. You can refine your search below.

CMS Medicare-linked records · Released 2026-10-15 · Coverage does not include every doctor.

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Location

Ontario, CA · Change

464 doctors in this source

Alphabetical order · No paid placement

Aamir Z Jamal

Internal Medicine · Nephrology

Medical school not reported

Insurance and new-patient availability need confirmation.

Aaron J Watson

Psychiatry

Medical school: Un Of California, Riverside, School Of Medicine

Insurance and new-patient availability need confirmation.

Abbid Shah

Hospitalist · Internal Medicine

Medical school not reported

Insurance and new-patient availability need confirmation.

Abid A Rizvi

Internal Medicine · Undefined Physician Type (Specify)

Medical school not reported

Insurance and new-patient availability need confirmation.

Aimee L Quan

Radiation Oncology

Medical school: University Of Cincinnati College Of Medicine

Insurance and new-patient availability need confirmation.

Ajay G Meka

General Practice · Internal Medicine

Medical school not reported

Insurance and new-patient availability need confirmation.

Alan Kuo

Cardiovascular Disease (Cardiology)

Medical school not reported

Insurance and new-patient availability need confirmation.

Alberto E Yanez

Family Practice

Medical school: University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb)

Insurance and new-patient availability need confirmation.

Alexander K Han

Gastroenterology · Internal Medicine

Medical school not reported

Insurance and new-patient availability need confirmation.

Alireza Heshmat

Cardiovascular Disease (Cardiology) · Internal Medicine

Medical school not reported

Insurance and new-patient availability need confirmation.

Amanda Tang Vong

Ophthalmology

Medical school: Boston University School Of Medicine

Insurance and new-patient availability need confirmation.

Amila O Silva

Internal Medicine · Ophthalmology

Medical school: University Of Minnesota Medical School

Insurance and new-patient availability need confirmation.

Amir H Golsorkhi

Anesthesiology

Medical school: University Of Texas Medical Branch At Galveston

Insurance and new-patient availability need confirmation.

Amy Le

Internal Medicine

Medical school not reported

Insurance and new-patient availability need confirmation.

Explore specialties in Ontario, CA

Explore reported procedures in Ontario, CA

CMS reports these 26 categories for Medicare patients. Select one to check this location and specialty; other procedures are not covered.