Looking for your patient portal? Go here for MyChart. You can also request your medical records using the MyChart patient portal. ... Ballad Health HomeCare 509 Med Tech Parkway, Suite 200 Johnson City, TN 37604 (423) 431-6146 8 a.m. to 5 p.m. DME. Mediserve Medical Equipment 1183 Spratlin Park Drive Gray, TN 37615 (423) 477-9806 8:30 a.m. to 5 ....