ICD-10-CM > S00-T88 > S50-S59 > S54 > S54.9 > S54.92 S54.92 Injury of unspecified nerve at forearm level, left arm Non-Billable/Non-Specific Codes S54.92XA..., initial encounterS54.92XD..., subsequent encounterS54.92XS..., sequela