HealthcareDiscovery.AI / Doctors / California / Ontario / Psychiatry

Psychiatry in Ontario, California

Data updated monthly · Last refresh September 2026

9 Psychiatry providers practice in Ontario. Listings are drawn from federal public records and are not endorsements.

Psychiatry providers in Ontario

Listed alphabetically. 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. Adam Malik, DO
Ontario, CA · No drug or device payments recorded (2025) · Telehealth · (909) 789-0260
Dr. Ansar Malik, MBBS
Ontario, CA · No drug or device payments recorded (2025) · (310) 254-9397
Dr. David Takehana, DO
Ontario, CA · $140 in drug and device payments (2025) · (909) 458-1350
Dr. Dereck Wei, MD
Ontario, CA · $205 in drug and device payments (2025) · (909) 458-1350
Dr. Derick Ly, D.O., M.S.
Ontario, CA · $100 in drug and device payments (2025) · Telehealth · (909) 458-1350
Dr. Gal Andres, MD
Ontario, CA · $615 in drug and device payments (2025) · Telehealth · (909) 458-1350
Dr. Jacquelyn Dang, D.O.
Ontario, CA · No drug or device payments recorded (2025) · Telehealth · (909) 458-1350
Dr. Liana Tanase, M.D.
Ontario, CA · No drug or device payments recorded (2025) · (909) 983-2020
Dr. Usha Sachdev, M.D.
Ontario, CA · No drug or device payments recorded (2025) · (909) 865-2933

Conditions Psychiatry providers in Ontario, California commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Psychiatry providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Psychiatry providers are in Ontario, California?

There are 9 Psychiatry providers with active NPI records practicing in Ontario, according to federal NPPES data refreshed monthly.

What conditions do Psychiatry providers in Ontario treat?

Psychiatry providers in Ontario commonly treat depression, anxiety disorders, bipolar disorder, ADHD, PTSD and related conditions. Individual practices vary, so confirm with the provider before booking.

Where does this data come from?

Provider records 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.

All specialties in Ontario Psychiatry across California

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.