ICD-10-CM > S00-T88 > S80-S89 > S83 > S83.1 > S83.12 > S83.124 S83.124 Posterior dislocation of proximal end of tibia, right knee Non-Billable/Non-Specific Codes S83.124A..., initial encounterS83.124D..., subsequent encounterS83.124S..., sequela