His patients gave him an average rating of 4.5 out of 5 stars. Dr. Underbrink is an in-network provider for several insurance carriers, including Blue Cross Blue Shield Bronze, Blue Cross Blue Shield HMO, and Blue Cross Blue Shield Gold. Before completing his residency at a hospital affiliated with the University of Texas Medical Branch at Galveston, Dr. Underbrink attended medical school at the University of Texas Medical School at Houston. He is affiliated with the University of Texas Medical Branch (UTMB Health).