ICD-10-CM > Q00-QA0 > Q30-Q34 > Q31 Q31 Congenital malformations of larynx Non-Billable/Non-Specific Type 1 Excludes congenital laryngeal stridor NOS (P28.89) Codes Q31.0Web of larynxQ31.1Congenital subglottic stenosisQ31.2Laryngeal hypoplasiaQ31.3LaryngoceleQ31.5Congenital laryngomalaciaQ31.8Other congenital malformations of larynxQ31.9Congenital malformation of larynx, unspecified