| T27 | Burn and corrosion of respiratory tract | NON-BILLABLE CODE |
| T27.0 | Burn of larynx and trachea | NON-BILLABLE CODE |
| T27.0XXA | Burn of larynx and trachea, initial encounter | BILLABLE CODE |
| T27.0XXD | Burn of larynx and trachea, subsequent encounter | BILLABLE CODE |
| T27.0XXS | Burn of larynx and trachea, sequela | BILLABLE CODE |
| T27.1 | Burn involving larynx and trachea with lung | NON-BILLABLE CODE |
| T27.1XXA | Burn involving larynx and trachea with lung, initial encounter | BILLABLE CODE |
| T27.1XXD | Burn involving larynx and trachea with lung, subsequent encounter | BILLABLE CODE |
| T27.1XXS | Burn involving larynx and trachea with lung, sequela | BILLABLE CODE |
| T27.2 | Burn of other parts of respiratory tract | NON-BILLABLE CODE |
| T27.2XXA | Burn of other parts of respiratory tract, initial encounter | BILLABLE CODE |
| T27.2XXD | Burn of other parts of respiratory tract, subsequent encounter | BILLABLE CODE |
| T27.2XXS | Burn of other parts of respiratory tract, sequela | BILLABLE CODE |
| T27.3 | Burn of respiratory tract, part unspecified | NON-BILLABLE CODE |
| T27.3XXA | Burn of respiratory tract, part unspecified, initial encounter | BILLABLE CODE |
| T27.3XXD | Burn of respiratory tract, part unspecified, subsequent encounter | BILLABLE CODE |
| T27.3XXS | Burn of respiratory tract, part unspecified, sequela | BILLABLE CODE |
| T27.4 | Corrosion of larynx and trachea | NON-BILLABLE CODE |
| T27.4XXA | Corrosion of larynx and trachea, initial encounter | BILLABLE CODE |
| T27.4XXD | Corrosion of larynx and trachea, subsequent encounter | BILLABLE CODE |
| T27.4XXS | Corrosion of larynx and trachea, sequela | BILLABLE CODE |
| T27.5 | Corrosion involving larynx and trachea with lung | NON-BILLABLE CODE |
| T27.5XXA | Corrosion involving larynx and trachea with lung, initial encounter | BILLABLE CODE |
| T27.5XXD | Corrosion involving larynx and trachea with lung, subsequent encounter | BILLABLE CODE |
| T27.5XXS | Corrosion involving larynx and trachea with lung, sequela | BILLABLE CODE |
| T27.6 | Corrosion of other parts of respiratory tract | NON-BILLABLE CODE |
| T27.6XXA | Corrosion of other parts of respiratory tract, initial encounter | BILLABLE CODE |
| T27.6XXD | Corrosion of other parts of respiratory tract, subsequent encounter | BILLABLE CODE |
| T27.6XXS | Corrosion of other parts of respiratory tract, sequela | BILLABLE CODE |
| T27.7 | Corrosion of respiratory tract, part unspecified | NON-BILLABLE CODE |
| T27.7XXA | Corrosion of respiratory tract, part unspecified, initial encounter | BILLABLE CODE |
| T27.7XXS | Corrosion of respiratory tract, part unspecified, sequela | BILLABLE CODE |
