Christus St. Michael Health System in Texarkana, Texas . Health (3 days ago) Christus St. Michael Health System, also known as Christus Health Ark-la-tex, is a General Acute Care Hospital in Texarkana, Texas.The NPI Number for Christus St. Michael Health System is 1295736734. The current location address for Christus St. Michael Health System is 2600 Saint Michael Dr, , Texarkana, Texas and ....