ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.4 > T22.42 T22.42 Corrosion of unspecified degree of elbow Non-Billable/Non-Specific Codes T22.421Corrosion of unspecified degree of right elbowT22.421A..., initial encounterT22.421D..., subsequent encounterT22.421S..., sequelaT22.422Corrosion of unspecified degree of left elbowT22.422A..., initial encounterT22.422D..., subsequent encounterT22.422S..., sequelaT22.429Corrosion of unspecified degree of unspecified elbowT22.429A..., initial encounterT22.429D..., subsequent encounterT22.429S..., sequela