Houston, TX 77024. Office Visits + TeleVisits Mon-Thu 8:00am - 5:00pm Fri 8:00am - 4:00pm Sat 8:00am - 12:00pm. Katy Location. Memorial Hermann Medical Plaza 2 23960 Katy Freeway Suite 140 Katy, TX 77494. Office Visits + TeleVisits ... Patient Portal; Pay Invoice ....