W16.121S
✓ Billable
Fall into natural body of water striking bottom causing drowning and submersion, sequela
ICD-10-CM · FY2026 · External Causes of Morbidity
Code
W16.121S
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 W16.121S?
ICD-10-CM code W16.121S represents Fall into natural body of water striking bottom causing drowning and submersion, sequela. It is a billable diagnosis code in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.
Is W16.121S billable?
Yes. W16.121S is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is W16.121S in?
W16.121S belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.
Related codes in the W16 category
W16
Fall, jump or diving into water
Non-billable
W16.0
Fall into swimming pool
Non-billable
W16.1
Fall into natural body of water
Non-billable
W16.2
Fall in (into) filled bathtub or bucket of water
Non-billable
W16.3
Fall into other water
Non-billable
W16.4
Fall into unspecified water
Non-billable
W16.5
Jumping or diving into swimming pool
Non-billable
W16.6
Jumping or diving into natural body of water
Non-billable
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