Dr. DeLeon joined Cancer Care Centers of South Texas in Fredericksburg in July of 2007 after serving 13 years as a physician in the United States Air Force.

While in the Air Force, Dr. DeLeon served as a staff physician and department chair in Hematology-Oncology at Wilford Hall Medical Center in San Antonio.  He reached the rank of Lt. Colonel, and gained valuable practice experience treating numerous patients with many varieties of cancer and blood disorders.  Dr. DeLeon also participated in numerous areas of clinical research as an investigator with Southwest Oncology Group, the Prostate Cancer Prevention Study and the Drug Development Program at Brooke Army Medical Center.

Dr. DeLeon is a member of the American Society of Hematology and the American Society of Clinical Oncology, and has recently re-certified his American Board of Internal Medicine certifications in both Hematology and Medical Oncology.

In Fredericksburg, Dr. DeLeon is proud to work in a truly unique office, with a phenomenal group of experienced nurses, assistants, lab technicians, and administrators, all of whom are dedicated to providing compassionate and efficient health care in a professional and friendly manner.  He is on the active medical staff at Hill Country Memorial Hospital.  He lives in the Hill Country with his four children.