| R06 | Abnormalities of breathing | NON-BILLABLE CODE |
| R06.0 | Dyspnea | NON-BILLABLE CODE |
| R06.00 | Dyspnea, unspecified | BILLABLE CODE |
| R06.01 | Orthopnea | BILLABLE CODE |
| R06.02 | Shortness of breath | BILLABLE CODE |
| R06.03 | Acute respiratory distress | BILLABLE CODE |
| R06.1 | Stridor | BILLABLE CODE |
| R06.2 | Wheezing | BILLABLE CODE |
| R06.3 | Periodic breathing | BILLABLE CODE |
| R06.4 | Hyperventilation | BILLABLE CODE |
| R06.5 | Mouth breathing | BILLABLE CODE |
| R06.6 | Hiccough | BILLABLE CODE |
| R06.7 | Sneezing | BILLABLE CODE |
| R06.8 | Other abnormalities of breathing | NON-BILLABLE CODE |
| R06.81 | Apnea, not elsewhere classified | BILLABLE CODE |
| R06.82 | Tachypnea, not elsewhere classified | BILLABLE CODE |
| R06.83 | Snoring | BILLABLE CODE |
| R06.89 | Other abnormalities of breathing | BILLABLE CODE |
| R06.9 | Unspecified abnormalities of breathing | BILLABLE CODE |
