BACK TO PROVIDERS Amanda Ng, N.P. Nurse Practitioner Sleep Center What our patients are saying “Amanda was very compassionate and concerned about my medical issue. She gave me excellent care.” Sleep Center 4 Limited CentreJohnson City, TN 37604 Office hours: 8:00am – 5:00pm Clinical hours: 9:00pm – 6:30am Additional outpatient services offered at: SOFHA Sleep Center - Kingsport 2002 Brookside Drive Suite 300 Kingsport, TN 37660 Schedule an appointment: (423) 794-5890