External constriction, unspecified ankle, initial encounter

Instruction Source: S90.549A

External constriction, unspecified ankle, initial encounter

Instruction Source: S90.549

External constriction, unspecified ankle

Instruction Source: S90.54

External constriction of ankle

Instruction Source: S90.5

Other superficial injuries of ankle

Instruction Source: S90

Superficial injury of ankle, foot and toes

Instruction Source: S90-S99

Injuries to the ankle and foot (S90-S99)

Excludes 2 (Not Included Here)

• burns and corrosions (T20-T32)
• fracture of ankle and malleolus (S82.-)
• frostbite (T33-T34)
• insect bite or sting, venomous (T63.4)

Instruction Source: S00-T88

Injury, poisoning and certain other consequences of external causes

Excludes 2 (Not Included Here)

• birth trauma (P10-P15)
• obstetric trauma (O70-O71)

Clinical 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