ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.7 > T22.72 > T22.729 T22.729 Corrosion of third degree of unspecified elbow Non-Billable/Non-Specific Codes T22.729A..., initial encounterT22.729D..., subsequent encounterT22.729S..., sequela