| G8842 | Apnea hypopnea index (ahi), respiratory disturbance index (rdi) or respiratory event index (rei) documented or measured within 2 months of initial evaluation for suspected obstructive sleep apnea |
| G8844 | Apnea hypopnea index (ahi), respiratory disturbance index (rdi), or respiratory event index (rei) not documented or measured within 2 months of initial evaluation for suspected obstructive sleep apnea, reason not given |
| G0399 | Home sleep test (hst) with type iii portable monitor, unattended; minimum of 4 channels: 2 respiratory movement/airflow, 1 ecg/heart rate and 1 oxygen saturation |
