Main Clinic & Sleep Lab 3400 Andrews Highway Midland, Texas 79703 View Map & Directions ›. Contact: Phone: 432-570-9991 Fax: 432-570-9998. Office Hours: Main Office Mondays to Fridays: 8:00 am - 5:00 pm Lunch: 12:30 pm - 1:30 pm Sleep Lab Mondays to Sunday: 8:00 pm - 6:00 am. Stay Connected..