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ICD-10-CM · FY 2026 APRIL UPDATE

Y21

Drowning and submersion, undetermined intent

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
Y21.0Drowning and submersion while in bathtub, undetermined intentCategory
Y21.0XXADrowning and submersion while in bathtub, undetermined intent, initial encounterBillable
Y21.0XXDDrowning and submersion while in bathtub, undetermined intent, subsequent encounterBillable
Y21.0XXSDrowning and submersion while in bathtub, undetermined intent, sequelaBillable
Y21.1Drowning and submersion after fall into bathtub, undetermined intentCategory
Y21.1XXADrowning and submersion after fall into bathtub, undetermined intent, initial encounterBillable
Y21.1XXDDrowning and submersion after fall into bathtub, undetermined intent, subsequent encounterBillable
Y21.1XXSDrowning and submersion after fall into bathtub, undetermined intent, sequelaBillable
Y21.2Drowning and submersion while in swimming pool, undetermined intentCategory
Y21.2XXADrowning and submersion while in swimming pool, undetermined intent, initial encounterBillable
Y21.2XXDDrowning and submersion while in swimming pool, undetermined intent, subsequent encounterBillable
Y21.2XXSDrowning and submersion while in swimming pool, undetermined intent, sequelaBillable
Y21.3Drowning and submersion after fall into swimming pool, undetermined intentCategory
Y21.3XXADrowning and submersion after fall into swimming pool, undetermined intent, initial encounterBillable
Y21.3XXDDrowning and submersion after fall into swimming pool, undetermined intent, subsequent encounterBillable
Y21.3XXSDrowning and submersion after fall into swimming pool, undetermined intent, sequelaBillable
Y21.4Drowning and submersion in natural water, undetermined intentCategory
Y21.4XXADrowning and submersion in natural water, undetermined intent, initial encounterBillable
Y21.4XXDDrowning and submersion in natural water, undetermined intent, subsequent encounterBillable
Y21.4XXSDrowning and submersion in natural water, undetermined intent, sequelaBillable
Y21.8Other drowning and submersion, undetermined intentCategory
Y21.8XXAOther drowning and submersion, undetermined intent, initial encounterBillable
Y21.8XXDOther drowning and submersion, undetermined intent, subsequent encounterBillable
Y21.8XXSOther drowning and submersion, undetermined intent, sequelaBillable
Y21.9Unspecified drowning and submersion, undetermined intentCategory
Y21.9XXAUnspecified drowning and submersion, undetermined intent, initial encounterBillable
Y21.9XXDUnspecified drowning and submersion, undetermined intent, subsequent encounterBillable
Y21.9XXSUnspecified drowning and submersion, undetermined intent, sequelaBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.