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 710 Barrett's esophagus with low grade dysplasia
 * K22.711 Barrett's esophagus with high grade dysplasia
 * K22.719 Barrett's esophagus with dysplasia, unspecified
 * K22.8 Other specified diseases of esophagus
 * Hemorrhage of esophagus NOS
 * Excludes2: esophageal varices (I85.-)
 * Paterson-Kelly syndrome (D50.1)
 * K22.9 Disease of esophagus, unspecified

K23 Disorders of esophagus in diseases classified elsewhere

 * Code first underlying disease, such as:
 * congenital syphilis (A50.5)
 * Excludes1: late syphilis (A52.79)
 * megaesophagus due to Chagas' disease (B57.31)
 * tuberculosis (A18.83)

K25 Gastric ulcer

 * Includes: erosion (acute) of stomach
 * pylorus ulcer (peptic)
 * stomach ulcer (peptic)
 * Use additional code to identify:
 * alcohol abuse and dependence (F10.-)
 * Excludes1: acute gastritis (K29.0-)
 * peptic ulcer NOS (K27.-)
 * K25.0 Acute gastric ulcer with hemorrhage
 * K25.1 Acute gastric ulcer with perforation
 * K25.2 Acute gastric ulcer with both hemorrhage and perforation
 * K25.3 Acute gastric ulcer without hemorrhage or perforation
 * K25.4 Chronic or unspecified gastric ulcer with hemorrhage
 * K25.5 Chronic or unspecified gastric ulcer with perforation
 * K25.6 Chronic or unspecified gastric ulcer with both hemorrhage and perforation
 * K25.7 Chronic gastric ulcer without hemorrhage or perforation
 * K25.9 Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation

K26 Duodenal ulcer

 * Includes: erosion (acute) of duodenum
 * duodenum ulcer (peptic)
 * postpyloric ulcer (peptic)
 * Use additional code to identify:
 * alcohol abuse and dependence (F10.-)
 * Excludes1: peptic ulcer NOS (K27.-)
 * K26.0 Acute duodenal ulcer with hemorrhage
 * K26.1 Acute duodenal ulcer with perforation
 * K26.2 Acute duodenal ulcer with both hemorrhage and perforation
 * K26.3 Acute duodenal ulcer without hemorrhage or perforation
 * K26.