ICD-10-CM > V00-Y99 > V90-V94 > V93 > V93.2 > V93.21 V93.21 Heat exposure on board passenger ship Non-Billable/Non-Specific Applicable To Heat exposure on board Ferry-boatHeat exposure on board Liner Codes V93.21XA..., initial encounterV93.21XD..., subsequent encounterV93.21XS..., sequela