W16.521
⚠ Non-billable (Header)Jumping or diving into swimming pool striking bottom causing drowning and submersion
External causes of morbidity (V00-Y99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
❌ Excludes1
directThese codes are mutually exclusive. Never code them together.
- • drowning and submersion while in swimming pool without jumping or diving (W67)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • accidental non-watercraft drowning and submersion not involving fall (W65-W74)
- • effects of air pressure from diving (W94.-)
- • fall into water from watercraft (V90-V94)
- • hitting an object or against bottom when falling from watercraft (V94.0)
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • striking or hitting diving board (W21.4)
Child Codes (3)
Clinical Description
ICD-10-CM code W16.521 represents jumping or diving into swimming pool striking bottom causing drowning and submersion. This code falls under the External causes of morbidity (V00-Y99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
This is a 7-character code at the 6th level of specificity. There are 3 more specific child codes under W16.521. Coders should note that W16.521 has 5 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code W16.521?
ICD-10-CM code W16.521 is "Jumping or diving into swimming pool striking bottom causing drowning and submersion". It belongs to the category: External causes of morbidity (V00-Y99).
Is W16.521 a billable ICD-10 code?
No, W16.521 is a non-billable header code. A more specific child code must be used for billing.
What codes are excluded with W16.521?
W16.521 has 5 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Can W16.521 be coded with other codes?
W16.521 has 1 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in W16.52
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)