ICD-10-CM > S00-T88 > S80-S89 > S83 > S83.1 > S83.11 > S83.113 S83.113 Anterior subluxation of proximal end of tibia, unspecified knee Non-Billable/Non-Specific Codes S83.113A..., initial encounterS83.113D..., subsequent encounterS83.113S..., sequela