K20-K31 · 11 条目
K20Esophagitis类别：需要更具体的编码K21Gastro-esophageal reflux disease类别：需要更具体的编码K22Other diseases of esophagus类别：需要更具体的编码K23Disorders of esophagus in diseases classified elsewhere可计费的具体编码K25Gastric ulcer类别：需要更具体的编码K26Duodenal ulcer类别：需要更具体的编码K27Peptic ulcer, site unspecified类别：需要更具体的编码K28Gastrojejunal ulcer类别：需要更具体的编码K29Gastritis and duodenitis类别：需要更具体的编码K30Functional dyspepsia可计费的具体编码K31Other diseases of stomach and duodenum类别：需要更具体的编码hiatus hernia (K44.-)