ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.4 > T22.42 > T22.429 T22.429 Corrosion of unspecified degree of unspecified elbow Non-Billable/Non-Specific Codes T22.429A..., initial encounterT22.429D..., subsequent encounterT22.429S..., sequela