Rio Grande Valley(RGV) ACO

Welcome to the Rio Grande Valley Accountable Care Organization (RGV ACO) website. The health providers that make up this organization put service first and believe in patient-centered practice.

RGV ACO comprises various clinics in locations throughout Bexar, Cameron, and Hidalgo counties in South Texas. We serve the populations of Donna, Elsa, Harlingen, Helotes, McAllen, Mercedes, Mission, Weslaco and the surrounding communities.

Leading physicians include: Drs. C. Abreu, H. Amaya, D. Arce, A. Arizmendi, J. Bejarano, A. Castrillon, M. Fuentes, N. Kalaf, S. Landero, J. Lares, J. Martinez, P. McDougal, A. Ochoa, O. Olivares-Herrera, J. Peña, P. Peñalo, J. Sandoval, and J. Saviñon.

The physicians at these clinics are caregivers, focused on preventative health care through communication and education.


  • Abreu Adult Clinic
  • Castrillon Family Clinic
  • Donna Medical Clinic
  • Donna Day and Night Clinic
  • Elsa Medical Clinic
  • Hector G. Amaya, MD, PA
  • Helotes Medical Clinic
  • Main Family Practice
  • Mercedes Medical Clinic
  • Nelson Kalaf, MD
  • Providence Medical and Geriatric Associates, PA
  • Rio Grande Medicine
  • Rio Grande Valley Adult & Internal Medicine Specialists
  • Tierra Santa Family Medicine
  • Weslaco Family Care Center
  • Weslaco Medical Clinic

What is an ACO and how does it work?

An Accountable Care Organization is a program sponsored by the Centers for Medicare and Medicaid Services (CMS) that focuses on enhanced care coordination. CMS encourages participating health providers to commit to providing a positive patient experience that results in improved health outcomes and lowered health care expenses for their Medicare Fee-For-Service patient population.

Please visit or call 1-800-MEDICARE (1-800-633-4227) (TTY users should call1-877-486-2048) for general questions or additional information about Accountable Care Organizations. For Physician Compare