ICD-10-CM > S00-T88 > S80-S89 > S83 > S83.9 S83.9 Sprain of unspecified site of knee Non-Billable/Non-Specific Codes S83.90Sprain of unspecified site of unspecified kneeS83.90XA..., initial encounterS83.90XD..., subsequent encounterS83.90XS..., sequelaS83.91Sprain of unspecified site of right kneeS83.91XA..., initial encounterS83.91XD..., subsequent encounterS83.91XS..., sequelaS83.92Sprain of unspecified site of left kneeS83.92XA..., initial encounterS83.92XD..., subsequent encounterS83.92XS..., sequela