Y21Drowning and submersion, undetermined intent

Y21 is the ICD-10-CM diagnosis code for drowning and submersion, undetermined intent. It belongs to 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 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Y21.0 (intent), Y21.1 (intent), Y21.2 (intent), Y21.3 (intent), Y21.4 (intent), Y21.8 (intent) and Y21.9 (intent).

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