ICD-10-CM > S00-T88 > T79-T79 > T79 > T79.A > T79.A1 > T79.A19 T79.A19 Traumatic compartment syndrome of unspecified upper extremity Non-Billable/Non-Specific Codes T79.A19A..., initial encounterT79.A19D..., subsequent encounterT79.A19S..., sequela