ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.7 > T23.70 > T23.709 T23.709 Corrosion of third degree of unspecified hand, unspecified site Non-Billable/Non-Specific Codes T23.709A..., initial encounterT23.709D..., subsequent encounterT23.709S..., sequela