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Internal Medicine in Westminster, California

Data updated monthly · Last refresh September 2026

42 Internal Medicine providers practice in Westminster, and 69% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Westminster

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. Andy Ho, M.D.
Westminster, CA · $223 in drug and device payments (2025) · (714) 891-7393
Dr. Anh Thu Tran, MD
Westminster, CA · $2,934 in drug and device payments (2025) · (714) 379-4797
Dr. Anhtuan Nguyen, MD
Westminster, CA · $708 in drug and device payments (2025) · Telehealth · (714) 531-2000
Dr. Aruna Krishnaswamy, M.D.
Westminster, CA · $912 in drug and device payments (2025) · (714) 379-3221
Dr. Chinh Mai, MD
Westminster, CA · $3,803 in drug and device payments (2025) · Telehealth · (714) 839-5898
Dr. Cuong Ngo, MD
Westminster, CA · No drug or device payments recorded (2025) · (714) 899-3498
Dr. Cuong Nguyen, MD
Westminster, CA · No drug or device payments recorded (2025) · (714) 898-9966
Dr. Dao Nguyen, MD
Westminster, CA · $46 in drug and device payments (2025) · (714) 898-9966
Dr. Dat Nguyen, M.D.
Westminster, CA · $338 in drug and device payments (2025) · (714) 531-2548
Dr. Dean Ngo, MD
Westminster, CA · $1,649 in drug and device payments (2025) · Telehealth · (714) 531-0000
Dr. Derek Phan, M.D.
Westminster, CA · $41 in drug and device payments (2025) · (714) 891-7035
Dr. Hai Pham, M.D.
Westminster, CA · $245 in drug and device payments (2025) · (714) 531-8711
Dr. Hieu Tram, MD
Westminster, CA · $3,521 in drug and device payments (2025) · Telehealth · (714) 775-3060
Dr. Hoa Nguyen, M.D
Westminster, CA · $65 in drug and device payments (2025) · (714) 898-9770
Dr. Hong Duong, MD
Westminster, CA · $203 in drug and device payments (2025) · (714) 467-9923
Dr. Huan D Le, MD
Westminster, CA · $47 in drug and device payments (2025) · (714) 775-3066
Dr. Hung Nguyen, MD
Westminster, CA · $1,053 in drug and device payments (2025) · (714) 531-2091
Dr. Joshua Peloquin, DO
Westminster, CA · $91 in drug and device payments (2025) · (714) 379-3221
Dr. Khaled Chan, MD
Westminster, CA · $584 in drug and device payments (2025) · (714) 379-3221
Dr. Khue Vu, MD
Westminster, CA · $1,397 in drug and device payments (2025) · Telehealth · (714) 894-6233
Dr. Loan Ngo, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 892-1313
Dr. Loc Bui, M.D.
Westminster, CA · $507 in drug and device payments (2025) · (714) 897-2623
Dr. Meera Sohail, M.D
Westminster, CA · No drug or device payments recorded (2025) · (714) 916-0952
Dr. Melissa Siew, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 379-3221
Dr. Nhon Tran, M.D
Westminster, CA · No drug or device payments recorded (2025) · (714) 895-8583
Dr. Paul Duong, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 839-7332
Dr. Peter Nguyen-dang, MD
Westminster, CA · $73 in drug and device payments (2025) · (714) 531-2548
Dr. Phuc Nguyen, M.D.
Westminster, CA · $46 in drug and device payments (2025) · Telehealth · (714) 531-8915
Dr. Phuong-chi Phan, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 890-9241
Dr. Rifat Rifat, M.D.
Westminster, CA · No drug or device payments recorded (2025) · Telehealth · (714) 895-7944
Dr. Tan Ngo, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 839-8400
Dr. Thu Thuy Huynh, M.D.
Westminster, CA · $3,195 in drug and device payments (2025) · (714) 775-3066
Dr. Thu Vu, MD
Westminster, CA · $1,602 in drug and device payments (2025) · Telehealth · (714) 894-6233
Dr. Thuy Nguyen, M.D.
Westminster, CA · $60 in drug and device payments (2025) · (714) 775-1628
Dr. Toan Tran, M.D.
Westminster, CA · $1,994 in drug and device payments (2025) · Telehealth · (714) 379-0199
Dr. Trung Ly, MD
Westminster, CA · No drug or device payments recorded (2025) · (714) 531-0230
Dr. Tung Thai
Westminster, CA · No drug or device payments recorded (2025) · (714) 531-4100
Dr. Tu Nguyen, MD
Westminster, CA · $6,580 in drug and device payments (2025) · Telehealth · (714) 531-2091
Dr. Victoria Greblya, MD
Westminster, CA · $924 in drug and device payments (2025) · Telehealth · (714) 379-3221
Dr. Vivian Nguyen, MD
Westminster, CA · $83 in drug and device payments (2025) · (714) 248-9558
Dr. Vu Le, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 531-9515
Dr. Vuong Nguyen, M.D.
Westminster, CA · $1,902 in drug and device payments (2025) · (714) 467-4321

Conditions Internal Medicine providers in Westminster, 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 Westminster, California?

There are 42 Internal Medicine providers with active NPI records practicing in Westminster, according to federal NPPES data refreshed monthly.

How many Internal Medicine providers in Westminster received drug or device company payments?

29 of 42 (69%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Internal Medicine providers in Westminster treat?

Internal Medicine providers in Westminster 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 Westminster 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.