Y21: Drowning and submersion, undetermined intent

Codes under Y21 (Drowning and submersion, undetermined intent). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
Y21.0	Drowning and submersion while in bathtub, undetermined intent	—
Y21.0XXA	Drowning and submersion while in bathtub, undetermined intent, initial encounter	✓
Y21.0XXD	Drowning and submersion while in bathtub, undetermined intent, subsequent encounter	✓
Y21.0XXS	Drowning and submersion while in bathtub, undetermined intent, sequela	✓
Y21.1	Drowning and submersion after fall into bathtub, undetermined intent	—
Y21.1XXA	Drowning and submersion after fall into bathtub, undetermined intent, initial encounter	✓
Y21.1XXD	Drowning and submersion after fall into bathtub, undetermined intent, subsequent encounter	✓
Y21.1XXS	Drowning and submersion after fall into bathtub, undetermined intent, sequela	✓
Y21.2	Drowning and submersion while in swimming pool, undetermined intent	—
Y21.2XXA	Drowning and submersion while in swimming pool, undetermined intent, initial encounter	✓
Y21.2XXD	Drowning and submersion while in swimming pool, undetermined intent, subsequent encounter	✓
Y21.2XXS	Drowning and submersion while in swimming pool, undetermined intent, sequela	✓
Y21.3	Drowning and submersion after fall into swimming pool, undetermined intent	—
Y21.3XXA	Drowning and submersion after fall into swimming pool, undetermined intent, initial encounter	✓
Y21.3XXD	Drowning and submersion after fall into swimming pool, undetermined intent, subsequent encounter	✓
Y21.3XXS	Drowning and submersion after fall into swimming pool, undetermined intent, sequela	✓
Y21.4	Drowning and submersion in natural water, undetermined intent	—
Y21.4XXA	Drowning and submersion in natural water, undetermined intent, initial encounter	✓
Y21.4XXD	Drowning and submersion in natural water, undetermined intent, subsequent encounter	✓
Y21.4XXS	Drowning and submersion in natural water, undetermined intent, sequela	✓
Y21.8	Other drowning and submersion, undetermined intent	—
Y21.8XXA	Other drowning and submersion, undetermined intent, initial encounter	✓
Y21.8XXD	Other drowning and submersion, undetermined intent, subsequent encounter	✓
Y21.8XXS	Other drowning and submersion, undetermined intent, sequela	✓
Y21.9	Unspecified drowning and submersion, undetermined intent	—
Y21.9XXA	Unspecified drowning and submersion, undetermined intent, initial encounter	✓
Y21.9XXD	Unspecified drowning and submersion, undetermined intent, subsequent encounter	✓
Y21.9XXS	Unspecified drowning and submersion, undetermined intent, sequela	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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