ICD-10-CM > V00-Y99 > W00-W19 > W18 > W18.3 > W18.31 W18.31 Fall on same level due to stepping on an object Non-Billable/Non-Specific Applicable To Fall on same level due to stepping on an animal Type 1 Excludes slipping, tripping and stumbling without fall due to stepping on animal (W18.41) Codes W18.31XA..., initial encounterW18.31XD..., subsequent encounterW18.31XS..., sequela