Chamber Master Simpson Services, LLC Pathology Simpson Services, LLC Visit Website 4205 20th Avenue Valley, Alabama 36854 (334) 740-9548 About Map About Simpson Services, LLC is a private speech pathology clinic located in Valley, AL. We serve children and adults in Chambers, Troup, and Lee Counties directly and provide teletherapy across the country. What's Nearby? Distance: 5 10 15 20 25 50 mi.