ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.7 > T22.72 > T22.721 T22.721 Corrosion of third degree of right elbow Non-Billable/Non-Specific Codes T22.721A..., initial encounterT22.721D..., subsequent encounterT22.721S..., sequela