ICD-10-CM > S00-T88 > S50-S59 > S51 > S51.8 > S51.80 > S51.809 S51.809 Unspecified open wound of unspecified forearm Non-Billable/Non-Specific Applicable To Open wound of forearm NOS Codes S51.809A..., initial encounterS51.809D..., subsequent encounterS51.809S..., sequela