ICD-10-CM > S00-T88 > T20-T25 > T24 > T24.5 > T24.52 T24.52 Corrosion of first degree of knee Non-Billable/Non-Specific Codes T24.521Corrosion of first degree of right kneeT24.521A..., initial encounterT24.521D..., subsequent encounterT24.521S..., sequelaT24.522Corrosion of first degree of left kneeT24.522A..., initial encounterT24.522D..., subsequent encounterT24.522S..., sequelaT24.529Corrosion of first degree of unspecified kneeT24.529A..., initial encounterT24.529D..., subsequent encounterT24.529S..., sequela