Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes K00-K95 – Diseases of the digestive system (K00-K95) > 2024 ICD-10-CM Codes K20-K31 – Diseases of esophagus, stomach and duodenum (K20-K31) > 2024 ICD-10-CM Codes K21 – Gastro-esophageal reflux disease (K21) > 2024 ICD-10-CM Codes K21.0 – Gastro-esophageal reflux disease with esophagitis (K21.0)