T33.70XA Superficial frostbite of unsp knee and lower leg, init

Instructional Notes:

T33.70XA
Description: Superficial frostbite of unsp knee and lower leg, init
↓
T33.70
Description: Superficial frostbite of unspecified knee and lower leg
↓
T33.7
Description: Superficial frostbite of knee and lower leg
Exclude2:
- superficial frostbite of ankle and foot (T33.8-)
↓
T33
Description: Superficial frostbite
Include:
- frostbite with partial thickness skin loss
↓
T33-T34
Description: Frostbite (T33-T34)
Exclude2:
- hypothermia and other effects of reduced temperature (T68, T69.-)
↓
S00-T88
Description: Injury, poisoning and certain other consequences of external causes
Exclude2:
- birth trauma (P10-P15)
- obstetric trauma (O70-O71)
Notes:
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
Use Additional Code:
- code to identify any retained foreign body, if applicable (Z18.-)