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Internal Medicine Doctors in Texas

Data updated monthly · Last refresh October 2026

9,182 Internal Medicine providers practice in Texas, including 1,804 (20%) offering telehealth. The largest concentration is in Houston. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

9,182providers
1,804telehealth
Houstontop city

Internal Medicine by city in Texas

Choose a city to see providers there.

Internal Medicine in Houston1,496 providers
Internal Medicine in Dallas950 providers
Internal Medicine in San Antonio658 providers
Internal Medicine in Austin607 providers
Internal Medicine in Fort Worth394 providers
Internal Medicine in El Paso263 providers
Internal Medicine in Galveston217 providers
Internal Medicine in Plano209 providers
Internal Medicine in Temple195 providers
Internal Medicine in Tyler143 providers
Internal Medicine in Lubbock119 providers
Internal Medicine in Sugar Land108 providers
Internal Medicine in Arlington102 providers
Internal Medicine in Longview100 providers
Internal Medicine in Irving99 providers
Internal Medicine in Corpus Christi95 providers
Internal Medicine in Amarillo82 providers
Internal Medicine in Frisco81 providers
Internal Medicine in Harlingen73 providers
Internal Medicine in Webster70 providers
Internal Medicine in Odessa66 providers
Internal Medicine in Richardson62 providers
Internal Medicine in San Angelo61 providers
Internal Medicine in Round Rock61 providers

Internal Medicine providers in Texas

Listed by city, largest first. 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. Leticia Poret, MD PA
San Antonio, TX · $128 in drug and device payments (2025) · (210) 733-3005
Dr. Liem Du, M.D.
San Antonio, TX · $15 in drug and device payments (2025) · (210) 358-4000
Dr. Lina Ghosh, MD
San Antonio, TX · No drug or device payments recorded (2025) · (210) 733-5072
Dr. Lindsay White, M.D.
San Antonio, TX · $57 in drug and device payments (2025) · Telehealth · (210) 222-0137
Dr. Lino Ramos, MD
San Antonio, TX · $99 in drug and device payments (2025) · (210) 344-2673
Dr. Lisa Davis, M.D.
San Antonio, TX · $1,268 in drug and device payments (2025) · (210) 223-3246
Dr. Lizette Altieri-nazario, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 495-4397
Dr. Lorraine Richings, MD
San Antonio, TX · No drug or device payments recorded (2025) · (210) 478-7580
Dr. Lorraine Shirley-wenzel, M.D.
San Antonio, TX · $122 in drug and device payments (2025) · (210) 492-8922
Dr. Louis Cruz
San Antonio, TX · No drug or device payments recorded (2025) · (210) 297-4000
Dr. Lovelesh Manocha, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 224-1771
Dr. Lubna Naeem, MD
San Antonio, TX · $50 in drug and device payments (2025) · Telehealth · (210) 490-3800
Dr. Luis Bieler, MD
San Antonio, TX · $1,720 in drug and device payments (2025) · (210) 932-1324
Dr. Luis Silva, MD
San Antonio, TX · $20 in drug and device payments (2025) · Telehealth · (210) 462-1060
Dr. Madhavi Devagiri, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 638-2000
Dr. Madhu Badireddy, M.D
San Antonio, TX · $40 in drug and device payments (2025) · (210) 847-1486
Dr. Madhulika Banerjee, MD
San Antonio, TX · No drug or device payments recorded (2025) · (210) 450-9200
Dr. Maher Saloum, MD
San Antonio, TX · No drug or device payments recorded (2025) · (210) 616-1317
Dr. Majin Castillo, MD
San Antonio, TX · $34 in drug and device payments (2025) · (210) 436-7402
Dr. Manelys Acosta Serrano, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 732-1802
Dr. Mangala Nayak
San Antonio, TX · $14 in drug and device payments (2025) · Telehealth · (210) 358-8820
Dr. Manju Poovathoor, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 344-2673
Dr. Manuel Estrada, M.D.
San Antonio, TX · $418 in drug and device payments (2025) · (210) 309-1405
Dr. Manuel Martinez, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 921-3800
Dr. Manuel Rodriguez, M.D.
San Antonio, TX · $85,895 in drug and device payments (2025) · Telehealth · (210) 690-2273
Dr. Marcela Gallardo
San Antonio, TX · No drug or device payments recorded (2025) · (210) 916-5000
Dr. Marco Garcia, MD
San Antonio, TX · No drug or device payments recorded (2025) · (210) 533-0257
Dr. Maria Botez, MD
San Antonio, TX · $645 in drug and device payments (2025) · Telehealth · (210) 923-4372
Dr. Maria Cantu-cooper, MD
San Antonio, TX · $92 in drug and device payments (2025) · Telehealth · (210) 523-9933
Dr. Maria Chapa, MD
San Antonio, TX · $1,127 in drug and device payments (2025) · (210) 340-0801
Dr. Maria Cipriani, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 493-1048
Dr. Maria Jirka, M.D.
San Antonio, TX · $550 in drug and device payments (2025) · Telehealth · (210) 690-5700
Dr. Mariana Hernandez Rivera, MD
San Antonio, TX · No drug or device payments recorded (2025) · (210) 358-7000
Dr. Maria Najera, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 860-1260
Dr. Marichel Marcolino, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (726) 224-2402
Dr. Marilyn Galindo, MD
San Antonio, TX · $148 in drug and device payments (2025) · (210) 864-7329
Dr. Marisel Tindall, MD
San Antonio, TX · $150 in drug and device payments (2025) · (210) 543-7200
Dr. Marium Steele, MD
San Antonio, TX · $106 in drug and device payments (2025) · (210) 808-1407
Dr. Mark Isaeff, M.D.
San Antonio, TX · $125 in drug and device payments (2025) · (210) 572-4431
Dr. Mark Riddoch, MD
San Antonio, TX · $18 in drug and device payments (2025) · (210) 705-5600
Dr. Mark Thornton, MD
San Antonio, TX · No drug or device payments recorded (2025) · (210) 822-2004
Dr. Marnie Ross, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 314-0527
Dr. Martin Wiesenthal, MD
San Antonio, TX · No drug or device payments recorded (2025) · (210) 614-3365
Dr. Marvin Moszkowicz, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 450-6530
Dr. Matthew Cates, DO, MPH
San Antonio, TX · $136,188 in drug and device payments (2025) · (210) 688-5792
Dr. Matthew Dacso, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 358-4000
Dr. Max Cruz, MD
San Antonio, TX · No drug or device payments recorded (2025) · (210) 436-7402
Dr. Megan Poland, M.D.
San Antonio, TX · No drug or device payments recorded (2025) · (210) 617-5300
Dr. Melanie Musselman, DO
San Antonio, TX · $19 in drug and device payments (2025) · (210) 599-6000
Dr. Melissa Martinez-diaz, MD
San Antonio, TX · $855 in drug and device payments (2025) · (210) 921-3800

Conditions Internal Medicine providers in 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 Texas?

There are 9,182 Internal Medicine providers with active NPI records practicing in Texas, according to federal NPPES data refreshed monthly.

Do Internal Medicine providers in Texas offer telehealth?

Yes. 1,804 of the 9,182 Internal Medicine providers in Texas (about 20%) report offering telehealth services in CMS data.

Which cities in Texas have the most Internal Medicine providers?

Houston (1,496), Dallas (950), San Antonio (658) have the highest concentration of Internal Medicine providers in Texas.

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

3,948 of 9,182 Internal Medicine providers in Texas (43%) 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 Texas treat?

Internal Medicine providers 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 counts and profiles 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.

Do most Internal Medicine Doctors in Texas work in independent practices or large health systems?

Among 5,747 Internal Medicine Doctors in Texas enrolled in Medicare, 23% bill through a solo or small practice with fewer than 10 clinicians, 17% through a mid-size group of 10 to 99, and 60% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Internal Medicine Doctors in Texas work at?

According to CMS facility affiliation records, the Texas hospitals where the most Internal Medicine Doctors hold privileges are Memorial Hermann Hospital System in Houston; Baylor University Medical Center in Dallas; Houston Methodist Hospital in Houston.

Related reading on HealthcareDiscovery.AI

Internal Medicine in all 50 states Search all 9,182 in the directory Ask Zach for help choosing

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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. Are you a Internal Medicine in Texas? Get featured.