W16.521A Jumping or diving into swimming pool striking bottom causing drowning and submersion, initial encounter

Billable ICD-10-CM code, FY2026.

Built from W16.521 with 7th character A (initial encounter).

Applies from W16 Fall, jump or diving into water

Excludes1 (never code together)

• 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 (not included here)

• striking or hitting diving board (W21.4)

7th character note

• The appropriate 7th character is to be added to each code from category W16

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Applies from W16.521 Jumping or diving into swimming pool striking bottom causing drowning and submersion

Excludes1 (never code together)

• drowning and submersion while in swimming pool without jumping or diving (W67)

Code annotations containing back-references to W16.521A

Back-references to W16

• Type 1 Excludes: V90 Drowning and submersion due to accident to watercraft ("fall into water not from watercraft (W16.-)")
• Type 1 Excludes: V92 Drowning and submersion due to accident on board watercraft, without accident to watercraft ("fall into water without watercraft (W16.-)")
• Use Additional: W21.4 Striking against diving board ("code for subsequent falling into water, if applicable (W16.-)")

Diagnosis Index entries for W16.521A

• Drowning (accidental) › following › jump or dive › into › swimming-pool › striking › bottom
• Drowning (accidental) › in › swimming-pool › following › dive or jump › striking › bottom
• Jumped, jumping › into water › in › swimming pool › striking › bottom › causing drowning
• Striking against › bottom when › diving or jumping into water (in) › swimming pool › causing drowning

Nearby codes

• W16.512A Jumping or diving into swimming pool striking water surface causing other injury, initial encounter
• W16.512D Jumping or diving into swimming pool striking water surface causing other injury, subsequent encounter
• W16.512S Jumping or diving into swimming pool striking water surface causing other injury, sequela
• W16.52 Jumping or diving into swimming pool striking bottom
• W16.521 Jumping or diving into swimming pool striking bottom causing drowning and submersion
• W16.521A Jumping or diving into swimming pool striking bottom causing drowning and submersion, initial encounter (this code)
• W16.521D Jumping or diving into swimming pool striking bottom causing drowning and submersion, subsequent encounter
• W16.521S Jumping or diving into swimming pool striking bottom causing drowning and submersion, sequela
• W16.522 Jumping or diving into swimming pool striking bottom causing other injury
• W16.522A Jumping or diving into swimming pool striking bottom causing other injury, initial encounter
• W16.522D Jumping or diving into swimming pool striking bottom causing other injury, subsequent encounter