| K3181 | Angiodysplasia of stomach and duodenum |
| K31811 | Angiodysplasia of stomach and duodenum with bleeding |
| K31819 | Angiodysplasia of stomach and duodenum without bleeding |
| K3182 | Dieulafoy lesion (hemorrhagic) of stomach and duodenum |
| K3183 | Achlorhydria |
| K3184 | Gastroparesis |
| K3189 | Other diseases of stomach and duodenum |
| K319 | Disease of stomach and duodenum, unspecified |
| K31A | Gastric intestinal metaplasia |
| K31A0 | Gastric intestinal metaplasia, unspecified |
| K31A1 | Gastric intestinal metaplasia without dysplasia |
| K31A11 | Gastric intestinal metaplasia without dysplasia, involving the antrum |
| K31A12 | Gastr intestnl metaplasia w/o dysplasia, w the body (corpus) Gastric intestinal metaplasia without dysplasia, involving the body (corpus) |
| K31A13 | Gastric intestinal metaplasia without dysplasia, involving the fundus |
| K31A14 | Gastric intestinal metaplasia without dysplasia, involving the cardia |
| K31A15 | Gastric intestinal metaplasia without dysplasia, involving multiple sites |
| K31A19 | Gastric intestinal metaplasia without dysplasia, unspecified site |
| K31A2 | Gastric intestinal metaplasia with dysplasia |
| K31A21 | Gastric intestinal metaplasia with low grade dysplasia |
| K31A22 | Gastric intestinal metaplasia with high grade dysplasia |
| K31A29 | Gastric intestinal metaplasia with dysplasia, unspecified |
| K35 | Acute appendicitis |
| K352 | Acute appendicitis with generalized peritonitis |
| K3520 | Acute appendicitis with generalized peritonitis, without abscess |
| K35200 | Acute appendicitis with generalized peritonitis, without perforation or abscess |
| K35201 | Acute appendicitis with generalized peritonitis, with perforation, without abscess |
| K35209 | Acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforation |
| K3521 | Acute appendicitis with generalized peritonitis, with abscess |
| K35210 | Acute appendicitis with generalized peritonitis, without perforation, with abscess |
| K35211 | Acute appendicitis with gen peritonitis, with perf and abscs Acute appendicitis with generalized peritonitis, with perforation and abscess |
| K35219 | Acute appendicitis with generalized peritonitis, with abscess, unspecified as to perforation |
| K353 | Acute appendicitis with localized peritonitis |
| K3530 | Acute appendicitis with localized peritonitis, without perforation or gangrene |
| K3531 | Acute appendicitis with localized peritonitis and gangrene, without perforation |
| K3532 | Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscess |
| K3533 | Ac appendicitis with perf, loc peritonitis, and gangr, wbscs Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess |
| K358 | Other and unspecified acute appendicitis |
| K3580 | Unspecified acute appendicitis |
| K3589 | Other acute appendicitis |
| K35890 | Other acute appendicitis without perforation or gangrene |
| K35891 | Other acute appendicitis without perforation, with gangrene |
| K36 | Other appendicitis |
| K37 | Unspecified appendicitis |
| K38 | Other diseases of appendix |
| K380 | Hyperplasia of appendix |
| K381 | Appendicular concretions |
| K382 | Diverticulum of appendix |
| K383 | Fistula of appendix |
| K388 | Other specified diseases of appendix |
| K389 | Disease of appendix, unspecified |