ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.4 > T23.49 > T23.492 T23.492 Corrosion of unspecified degree of multiple sites of left wrist and hand Non-Billable/Non-Specific Codes T23.492A..., initial encounterT23.492D..., subsequent encounterT23.492S..., sequela