ICD-10-CM > S00-T88 > S80-S89 > S85 > S85.4 > S85.40 > S85.409 S85.409 Unspecified injury of lesser saphenous vein at lower leg level, unspecified leg Non-Billable/Non-Specific Codes S85.409A..., initial encounterS85.409D..., subsequent encounterS85.409S..., sequela