HealthcareDiscovery.AI / Doctors / California / Rialto / Internal Medicine

Internal Medicine in Rialto, California

Data updated monthly · Last refresh September 2026

12 Internal Medicine providers practice in Rialto. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Rialto

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. Charles Sabbah, M.D.
Rialto, CA · No drug or device payments recorded (2025) · Telehealth · (909) 874-2371
Dr. Hedyeh Golshan, M.D.
Rialto, CA · $342 in drug and device payments (2025) · (909) 875-1199
Dr. Hiteshi Thakker, M.D.
Rialto, CA · $210 in drug and device payments (2025) · (909) 583-2741
Dr. Ikechi Obiocha, MD
Rialto, CA · $141 in drug and device payments (2025) · (909) 822-1164
Dr. Mehrdad Ghahremani-ghajar, D.O.
Rialto, CA · $30 in drug and device payments (2025) · Telehealth · (909) 472-8375
Dr. Natasha Alexander, MD
Rialto, CA · No drug or device payments recorded (2025) · Telehealth · (909) 874-2371
Dr. Paul Chen, M.D.
Rialto, CA · $369 in drug and device payments (2025) · Telehealth · (909) 421-2700
Dr. Ravindranath Shahane, M.D.
Rialto, CA · $695 in drug and device payments (2025) · (909) 875-3595
Dr. Rogelio Toh, M.D.
Rialto, CA · No drug or device payments recorded (2025) · (909) 421-2700
Dr. Sun Soung, M.D.
Rialto, CA · No drug or device payments recorded (2025) · (909) 875-3595
Dr. Yousuf Sadiq, MD
Rialto, CA · $32 in drug and device payments (2025) · Telehealth · (909) 820-7377
Dr. Zeid Kayali, M.D.
Rialto, CA · $50,660 in drug and device payments (2025) · (909) 883-2999

Conditions Internal Medicine providers in Rialto, California commonly treat

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

Common questions

How many Internal Medicine providers are in Rialto, California?

There are 12 Internal Medicine providers with active NPI records practicing in Rialto, according to federal NPPES data refreshed monthly.

What conditions do Internal Medicine providers in Rialto treat?

Internal Medicine providers in Rialto commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management 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 Rialto Internal Medicine 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.