Y21.3XXS
✓ Billable
Drowning and submersion after fall into swimming pool, undetermined intent, sequela
ICD-10-CM · FY2026 · External Causes of Morbidity
Code
Y21.3XXS
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
External Causes of Morbidity
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Y21.3XXS?
ICD-10-CM code Y21.3XXS represents Drowning and submersion after fall into swimming pool, undetermined intent, sequela. It is a billable diagnosis code in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.
Is Y21.3XXS billable?
Yes. Y21.3XXS is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is Y21.3XXS in?
Y21.3XXS belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.
Related codes in the Y21 category
Y21
Drowning and submersion, undetermined intent
Non-billable
Y21.0
Drowning and submersion while in bathtub, undetermined intent
Non-billable
Y21.1
Drowning and submersion after fall into bathtub, undetermined intent
Non-billable
Y21.2
Drowning and submersion while in swimming pool, undetermined intent
Non-billable
Y21.3
Drowning and submersion after fall into swimming pool, undetermined intent
Non-billable
Y21.4
Drowning and submersion in natural water, undetermined intent
Non-billable
Y21.8
Other drowning and submersion, undetermined intent
Non-billable
Y21.9
Unspecified drowning and submersion, undetermined intent
Non-billable
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