ICD-10-CM > Q00-QA0 > Q80-Q89 > Q80 Q80 Congenital ichthyosis Non-Billable/Non-Specific Type 1 Excludes Refsum's disease (G60.1) Codes Q80.0Ichthyosis vulgarisQ80.1X-linked ichthyosisQ80.2Lamellar ichthyosisQ80.3Congenital bullous ichthyosiform erythrodermaQ80.4Harlequin fetusQ80.8Other congenital ichthyosisQ80.9Congenital ichthyosis, unspecified