Y21.4Drowning and submersion in natural water, undetermined intent

Y21.4 is the ICD-10-CM diagnosis code for drowning and submersion in natural water, undetermined intent. It belongs to category Y21 (drowning and submersion, undetermined intent), block Y21-Y33 (event of undetermined intent) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within Y21 (drowning and submersion, undetermined intent), Y21.4 is specifically for drowning and submersion in natural water, undetermined intent. Related codes cover drowning and submersion while in bathtub, undetermined intent (Y21.0), drowning and submersion after fall into bathtub, undetermined intent (Y21.1), drowning and submersion while in swimming pool, undetermined intent (Y21.2), drowning and submersion after fall into swimming pool, undetermined intent (Y21.3), other drowning and submersion, undetermined intent (Y21.8) and unspecified drowning and submersion, undetermined intent (Y21.9).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.