ICD-10-CM > S00-T88 > T20-T25 > T24 > T24.6 > T24.62 T24.62 Corrosion of second degree of knee Non-Billable/Non-Specific Codes T24.621Corrosion of second degree of right kneeT24.621A..., initial encounterT24.621D..., subsequent encounterT24.621S..., sequelaT24.622Corrosion of second degree of left kneeT24.622A..., initial encounterT24.622D..., subsequent encounterT24.622S..., sequelaT24.629Corrosion of second degree of unspecified kneeT24.629A..., initial encounterT24.629D..., subsequent encounterT24.629S..., sequela