| Y21 | Drowning and submersion, undetermined intent | NON-BILLABLE CODE |
| Y21.0 | Drowning and submersion while in bathtub, undetermined intent | NON-BILLABLE CODE |
| Y21.0XXA | Drowning and submersion while in bathtub, undetermined intent, initial encounter | BILLABLE CODE |
| Y21.0XXD | Drowning and submersion while in bathtub, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y21.0XXS | Drowning and submersion while in bathtub, undetermined intent, sequela | BILLABLE CODE |
| Y21.1 | Drowning and submersion after fall into bathtub, undetermined intent | NON-BILLABLE CODE |
| Y21.1XXA | Drowning and submersion after fall into bathtub, undetermined intent, initial encounter | BILLABLE CODE |
| Y21.1XXS | Drowning and submersion after fall into bathtub, undetermined intent, sequela | BILLABLE CODE |
| Y21.2 | Drowning and submersion while in swimming pool, undetermined intent | NON-BILLABLE CODE |
| Y21.2XXA | Drowning and submersion while in swimming pool, undetermined intent, initial encounter | BILLABLE CODE |
| Y21.2XXD | Drowning and submersion while in swimming pool, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y21.2XXS | Drowning and submersion while in swimming pool, undetermined intent, sequela | BILLABLE CODE |
| Y21.3 | Drowning and submersion after fall into swimming pool, undetermined intent | NON-BILLABLE CODE |
| Y21.3XXA | Drowning and submersion after fall into swimming pool, undetermined intent, initial encounter | BILLABLE CODE |
| Y21.3XXD | Drowning and submersion after fall into swimming pool, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y21.3XXS | Drowning and submersion after fall into swimming pool, undetermined intent, sequela | BILLABLE CODE |
| Y21.4 | Drowning and submersion in natural water, undetermined intent | NON-BILLABLE CODE |
| Y21.4XXA | Drowning and submersion in natural water, undetermined intent, initial encounter | BILLABLE CODE |
| Y21.4XXD | Drowning and submersion in natural water, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y21.4XXS | Drowning and submersion in natural water, undetermined intent, sequela | BILLABLE CODE |
| Y21.8 | Other drowning and submersion, undetermined intent | NON-BILLABLE CODE |
| Y21.8XXA | Other drowning and submersion, undetermined intent, initial encounter | BILLABLE CODE |
| Y21.8XXD | Other drowning and submersion, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y21.8XXS | Other drowning and submersion, undetermined intent, sequela | BILLABLE CODE |
| Y21.9 | Unspecified drowning and submersion, undetermined intent | NON-BILLABLE CODE |
| Y21.9XXA | Unspecified drowning and submersion, undetermined intent, initial encounter | BILLABLE CODE |
| Y21.9XXD | Unspecified drowning and submersion, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y21.9XXS | Unspecified drowning and submersion, undetermined intent, sequela | BILLABLE CODE |
