The Department of Pediatric Surgery at the University of Texas Medical School at Houston
Department of Pediatrics
The Department of Pediatric Surgery

Administrative Staff


Central Administration

Diane Harnden

Director, Management Operations I
Diane Harnden

Crystal Sharp

Administrative Services Officer I
Crystal Sharp

Scottie Wahlstrom

Sr. Executive Assistant / Fellowship Coordinator
Scottie Wahlstrom

Stephanie Baca

Research Coordinator I
Claudia Loza

Claudia Loza

Sr. Staff Assistant
Claudia Loza
  • Phone: 713.500.7274
  • Email: Claudia.R.Loza@uth.tmc.edu
  • Assistant to: Drs. Andrea Hayes-Jordan, Mary Austin, Michael Alexander Lypka, Michaelene Ribbeck, John Teichgraeber, KuoJen Tsao, Adam Vogel and Ruth Fleshman


Carmen Wallace

Sr. Grants and Contracts Specialist
Carmen Wallace

Accounting and Billing

Kim Edmonsond, CPC

Clinical Billing Manager
Kim Edmonsond

Douglas Grasty, CPC

Certified Coder
Douglas Grasty

Melissa Ramos

Insurance Verification Specialist
Melissa Torrez

Carolyn Vargas, CPC

Sr. Certified Coding Specialist
Carolyn Vargas, CPC

Elvia Wood

Certified Coding Specialist
Elvia Wood

Nancy Zambrano, CPC

Certified Coder
Nancy Zambrano