MyChart Patient Portal; My Medical Records; Outpatient Observation Status; OWL Patient Portal ... Tri-State Mountain Neurology Associates, PC. 1321 Sunset Dr. Suite 11. Johnson City, TN 37604 (423) 928-6174. Map & Directions. Hospitals. Johnson City Medical Center. 400 N. State of Franklin Rd. Johnson City, TN 37604. Map & Directions ....