ICD-10-CM>K00-K95>K20-K31>K23K23Disorders of esophagus in diseases classified elsewhereBillable/Specific Copy Code Copy DescriptionCode Firstunderlying disease, such as:congenital syphilis (A50.5)Type 1 Excludeslate syphilis (A52.79)megaesophagus due to Chagas' disease (B57.31)tuberculosis (A18.83)