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Mark C. DeLeon, M.D.

Mark C. DeLeon, M.D.

Provider Type: Physician

  • Hematology
  • Medical Oncology
Board Certifications:
  • Medical Oncology
  • Hematology
  • Internal Medicine

General Summary

Dr. DeLeon served for 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.


  • Fellowship
    San Antonio Uniformed Services Health Education Consortium, San Antonio, TX
  • Residency
    Wilford Hall Medical Center, San Antonio, TX
  • Internship
    Wilford Hall Medical Center, San Antonio, TX
  • Medical Doctorate
    Uniformed Services University of the Health Sciences, Bethesda, MD

Medical Practice

Research Interest

Surgery Locations

Other Information

Accolades & Memberships

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.

Community Service