S80.249 External constriction, unspecified kneeNon-billable ICD-10-CM code.
M23 Internal derangement of knee ("current injury - see injury of knee and lower leg (S80-S89)")S80.241S External constriction, right knee, sequelaS80.242 External constriction, left kneeS80.242A External constriction, left knee, initial encounterS80.242D External constriction, left knee, subsequent encounterS80.242S External constriction, left knee, sequelaS80.249 External constriction, unspecified knee (this code)S80.249A External constriction, unspecified knee, initial encounterS80.249D External constriction, unspecified knee, subsequent encounterS80.249S External constriction, unspecified knee, sequelaS80.25 Superficial foreign body of kneeS80.251 Superficial foreign body, right knee