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Internal Medicine in Houston, Texas

Data updated monthly · Last refresh September 2026

1,496 Internal Medicine providers practice in Houston, and 44% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Houston

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. Wei-ming Tuan, MD
Houston, TX · No drug or device payments recorded (2025) · (713) 442-0000
Dr. Wei-ning Sun
Houston, TX · No drug or device payments recorded (2025) · (713) 441-5114
Dr. Wei Wang, MD/PHD
Houston, TX · No drug or device payments recorded (2025) · (713) 588-4926
Dr. Wei Yang, M.D.
Houston, TX · $38 in drug and device payments (2025) · (786) 683-9736
Dr. Wen Yang, MD
Houston, TX · $773 in drug and device payments (2025) · Telehealth · (281) 876-3847
Dr. Willa Hong, DO
Houston, TX · No drug or device payments recorded (2025) · (713) 526-5511
Dr. William Couch, MD
Houston, TX · No drug or device payments recorded (2025) · (281) 440-5300
Dr. William Franklin
Houston, TX · No drug or device payments recorded (2025) · (713) 779-5180
Dr. William Graham, MD
Houston, TX · No drug or device payments recorded (2025) · (713) 873-8890
Dr. William Lent, M.D.
Houston, TX · No drug or device payments recorded (2025) · (713) 526-5606
Dr. William Manuel, MD
Houston, TX · $168 in drug and device payments (2025) · (713) 528-3366
Dr. William Mcinturf, DO
Houston, TX · No drug or device payments recorded (2025) · (832) 869-4818
Dr. William Mckee, M.D, FACP
Houston, TX · $1,285 in drug and device payments (2025) · Telehealth · (713) 441-4280
Dr. William Nguyen, MD
Houston, TX · $53 in drug and device payments (2025) · (713) 626-9971
Dr. Windsen Pan, M.D.
Houston, TX · $592 in drug and device payments (2025) · Telehealth · (281) 737-0570
Dr. Winston Suh
Houston, TX · No drug or device payments recorded (2025) · Telehealth · (713) 798-1750
Dr. Winston Watkins, MD
Houston, TX · No drug or device payments recorded (2025) · (713) 650-6556
Dr. Wuju Chun, M.D.
Houston, TX · No drug or device payments recorded (2025) · (832) 341-5229
Dr. Yadier Brito-cuas, MD
Houston, TX · No drug or device payments recorded (2025) · (713) 500-6500
Dr. Yago Nieto, M.D.
Houston, TX · No drug or device payments recorded (2025) · (713) 792-6161
Dr. Yakov Gizersky, D.O.
Houston, TX · No drug or device payments recorded (2025) · (281) 794-7515
Dr. Yaman Abdullah, M.D.
Houston, TX · No drug or device payments recorded (2025) · (713) 500-6536
Dr. Yamini Naygandhi, MD
Houston, TX · $33 in drug and device payments (2025) · Telehealth · (713) 442-4000
Dr. Yasmin Marcantonio
Houston, TX · No drug or device payments recorded (2025) · (713) 798-4951
Dr. Yasmin Moolani, M.D.
Houston, TX · No drug or device payments recorded (2025) · (713) 798-0190
Dr. Yasodara Udayamurthy, MD
Houston, TX · $104 in drug and device payments (2025) · (713) 442-1700
Dr. Yassar Ahmed, M.D.
Houston, TX · No drug or device payments recorded (2025) · (713) 960-8008
Dr. Yee Tham, M.D.
Houston, TX · No drug or device payments recorded (2025) · (713) 798-1655
Dr. Yong Rhee, M.D.
Houston, TX · No drug or device payments recorded (2025) · (713) 932-1010
Dr. Yousf Radwan, MD
Houston, TX · No drug or device payments recorded (2025) · (713) 790-3311
Dr. Youshi Yin, M.D.
Houston, TX · No drug or device payments recorded (2025) · (713) 873-2000
Dr. Yun Li, M.D.
Houston, TX · $25 in drug and device payments (2025) · (281) 737-1000
Dr. Yusuf Adenwala, M.D.
Houston, TX · No drug or device payments recorded (2025) · (713) 790-3311
Dr. Yusuf Chang, MD
Houston, TX · $144 in drug and device payments (2025) · (713) 790-3311
Dr. Yvonne Heung, M.D.
Houston, TX · No drug or device payments recorded (2025) · Telehealth · (713) 792-6161
Dr. Zaara Qasim
Houston, TX · No drug or device payments recorded (2025) · (713) 798-4951
Dr. Zachary Kinler, MD
Houston, TX · No drug or device payments recorded (2025) · (601) 215-0195
Dr. Zachary Smith, MD
Houston, TX · $395 in drug and device payments (2025) · Telehealth · (281) 597-8555
Dr. Zahida Siddiqi, MD
Houston, TX · $533 in drug and device payments (2025) · Telehealth · (713) 461-2915
Dr. Zaid Safder, MD
Houston, TX · No drug or device payments recorded (2025) · (281) 929-6100
Dr. Zaven Sargsyan, MD
Houston, TX · No drug or device payments recorded (2025) · (713) 873-8890
Dr. Zehra Tosur, M.D.
Houston, TX · No drug or device payments recorded (2025) · Telehealth · (713) 798-2500
Dr. Zenithe Ware, MD
Houston, TX · $272 in drug and device payments (2025) · Telehealth · (713) 363-7640
Dr. Zhihao Dai, M.D.
Houston, TX · $2,254 in drug and device payments (2025) · Telehealth · (713) 814-2800
Dr. Zhihao Zhu, MD
Houston, TX · $328 in drug and device payments (2025) · (713) 441-5114
Dr. Zoya Hussain, D.O.
Houston, TX · $37 in drug and device payments (2025) · (713) 500-6713

Conditions Internal Medicine providers in Houston, Texas 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 Houston, Texas?

There are 1,496 Internal Medicine providers with active NPI records practicing in Houston, according to federal NPPES data refreshed monthly.

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

655 of 1,496 (44%) 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 Houston treat?

Internal Medicine providers in Houston 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 Houston Internal Medicine across Texas

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.