ICD-10 code for arm frostbite

The ICD-10-CM code for arm frostbite is T33.4 (Superficial frostbite of arm). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on T33.4.

Within T33 (superficial frostbite), T33.4 is specifically for superficial frostbite of arm. Related codes cover of head (T33.0), of neck (T33.1), of thorax (T33.2), of abdominal wall, lower back and pelvis (T33.3), of wrist, hand, and fingers (T33.5), of hip and thigh (T33.6), of knee and lower leg (T33.7), of ankle, foot, and toe(s) (T33.8) and 1 more.

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.

The conditions in its Excludes2 note aren't part of T33.4, but may be coded alongside it if the patient has both: superficial frostbite of wrist and hand (T33.5-).