Welcome to the Obstetrics and Gynecology Residency Program

Training excellent physicians who will go on to achieve success and become outstanding leaders

Meet our Residents PGY-1

Samantha Castillo, DO

Rank – PGY1


Dr. Samantha Castillo was born in San Antonio, TX and completed her undergraduate studies at the University of Texas at Austin. She attended medical school at the University of North Texas Health Science Center- Texas College of Osteopathic Medicine. Her hobbies include spending time with family and friends, being active outside, and supporting all Longhorn athletic teams. Hook ‘em!

Alejandra Vega, MD

Rank – PGY-1


Dr. Alejandra Vega completed her undergraduate education at Pomona College in Claremont, California. She graduated from the University of Kansas School of Medicine with her medical degree in 2017. She enjoys reading, binge-watching television shows, and spending time with Dobby (her cat).

Tiffany Alexander, MD

Rank – PGY-1


Dr. Tiffany Alexander was born in Montreal, Quebec and completed her undergraduate studies at McGill University with a bachelor of science in Nursing. She received her medical degree from Meharry Medical College in Nashville, Tennessee. She is a strong advocate for women's rights, maternal-child health and wellbeing, and breastfeeding.


Dr. Alexander is of Grenadian and Vincentian decent and enjoys traveling across the Caribbean. Her other hobbies include spending time with her loved ones, cooking and lounging on the beach.

Jonathan Pepper, MD

Rank – PGY-1


Originally from New Orleans, Louisiana, Dr. Jonathan Pepper completed his undergraduate training at Louisiana State University (LSU) in Baton Rouge where he majored in Biological Engineering.   He graduated from medical school at LSU Health Sciences Center in Shreveport.


Dr. Pepper enjoys powerlifting, Olympic training, and cooking (particularly foods of the spicier variety).

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