ICD-10-CM > S00-T88 > S80-S89 > S85 > S85.4 > S85.40 > S85.401 S85.401 Unspecified injury of lesser saphenous vein at lower leg level, right leg Non-Billable/Non-Specific Codes S85.401A..., initial encounterS85.401D..., subsequent encounterS85.401S..., sequela