Promise Medical Group Rogersville TN 37857. Nursing (Nurse Practitioner) • 1 Provider. 312 S Armstrong St, Rogersville TN, 37857. Make an Appointment. (423) 254-6406. Promise Medical Group Rogersville TN 37857 is a medical group practice located in Rogersville, TN that specializes in Nursing (Nurse Practitioner)..