NCIthesaurus expressive language disorder UMLS_CUI:C0236826 ICD10CM:F80.1 DOID:11385 A language disorder that involves difficulties with verbal and written expression characterized by an ability to use expressive spoken language that is markedly below the appropriate level for the mental age, but with a language comprehension that is within normal limits. SNOMEDCT_US_2025_09_01:80360005 ICD9CM:315.31 Developmental expressive language disorder NCI:C92562 disease_ontology language disorder