texas oncology more breakthroughs. more victories
  • Request an Appointment
  • Find a cancer center
  • Find a provider
  • Clinical Trials



Billie J. Marek, M.D., FACP

General Summary

Dr. Billie Marek is certified by the American Board of Internal Medicine in internal medicine and also certified with the sub-specialty of medical oncology. Dr. Marek has served on the Board of Texas Oncology since 1994 and is the Medical Director for Texas Oncology, McAllen. He received the Texas Merit Scholarship in 1981 and 1982; Outstanding Intern and Teacher, Department of Medicine, University of Kentucky in 1984; and the 1993 Doctor of the Year award from Rio Grande Regional Hospital.


Medical degree in 1983 from the University of Texas Medical School at San Antonio, Texas; internship and residency in internal medicine at the University of Kentucky College of Medicine, Lexington, Kentucky 1983-1986; internal medicine and medical oncology fellowship at M.D. Anderson Cancer Center, Houston, Texas 1986 - 1988.

Medical Practice

Other Information

Accolades & Memberships

American Medical Association, American College of Physicians, Hidalgo County Medical Society, Texas Medical Association, American Society of Clinical Oncology, Texas Society of Medical Oncology, Texas Medical Foundation, M.D. Anderson Associates, and Century Club Member - Texas A & M Association of Former Students. In 2005, 2006, 2007 and 2008, Dr. Marek has been named among the Super Doc List from Texas Monthly magazine.

Community Service

Research Interest


  • Comparison of 24-Month Outcomes in Chelated and non-Chelated Lower-risk Patients with Myelodysplastic Syndromes in a Prospective Registry

    Leukemia Research, 2014