ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.4 > T22.42 > T22.422 T22.422 Corrosion of unspecified degree of left elbow Non-Billable/Non-Specific Codes T22.422A..., initial encounterT22.422D..., subsequent encounterT22.422S..., sequela