ICD-10-CM > S00-T88 > S80-S89 > S83 > S83.1 > S83.13 S83.13 Medial subluxation and dislocation of proximal end of tibia Non-Billable/Non-Specific Codes S83.131Medial subluxation of proximal end of tibia, right kneeS83.131A..., initial encounterS83.131D..., subsequent encounterS83.131S..., sequelaS83.132Medial subluxation of proximal end of tibia, left kneeS83.132A..., initial encounterS83.132D..., subsequent encounterS83.132S..., sequelaS83.133Medial subluxation of proximal end of tibia, unspecified kneeS83.133A..., initial encounterS83.133D..., subsequent encounterS83.133S..., sequelaS83.134Medial dislocation of proximal end of tibia, right kneeS83.134A..., initial encounterS83.134D..., subsequent encounterS83.134S..., sequelaS83.135Medial dislocation of proximal end of tibia, left kneeS83.135A..., initial encounterS83.135D..., subsequent encounterS83.135S..., sequelaS83.136Medial dislocation of proximal end of tibia, unspecified kneeS83.136A..., initial encounterS83.136D..., subsequent encounterS83.136S..., sequela