HealthcareDiscovery.AI / Doctors / California / Rancho Cucamonga / Internal Medicine

Internal Medicine in Rancho Cucamonga, California

Data updated monthly · Last refresh September 2026

13 Internal Medicine providers practice in Rancho Cucamonga. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Rancho Cucamonga

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. Carlos Vigil, DO
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (909) 941-0661
Dr. Catherine Joy Cabugao
Rancho Cucamonga, CA · $115 in drug and device payments (2025) · (909) 466-8888
Dr. Cong Phan, M.D.
Rancho Cucamonga, CA · $540 in drug and device payments (2025) · Telehealth · (909) 484-4900
Dr. Hetalben Makwana, MD
Rancho Cucamonga, CA · $264 in drug and device payments (2025) · (909) 981-0989
Dr. Mohamed Ali, M.D.
Rancho Cucamonga, CA · $22 in drug and device payments (2025) · Telehealth · (909) 481-0800
Dr. Nena Arciaga
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (818) 532-2222
Dr. Nyein Tint, M.D.
Rancho Cucamonga, CA · $1,309 in drug and device payments (2025) · Telehealth · (909) 987-2528
Dr. Raheel Sayed
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (928) 278-7267
Dr. Rishi Talwar, MD
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (909) 941-0661
Dr. Tarek Ezzeddine, MD
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · Telehealth · (909) 360-4722
Dr. Teri Rhetta, M.D.
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (951) 335-3769
Dr. Yangdong He
Rancho Cucamonga, CA · $43 in drug and device payments (2025) · (734) 358-2738
Dr. Ythanh Nguyen, MD
Rancho Cucamonga, CA · $136 in drug and device payments (2025) · (909) 484-4900

Conditions Internal Medicine providers in Rancho Cucamonga, 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 Rancho Cucamonga, California?

There are 13 Internal Medicine providers with active NPI records practicing in Rancho Cucamonga, according to federal NPPES data refreshed monthly.

What conditions do Internal Medicine providers in Rancho Cucamonga treat?

Internal Medicine providers in Rancho Cucamonga 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 Rancho Cucamonga 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.