| R10 | Abdominal and pelvic pain |
| R10.0 | Acute abdomen |
| R10.1 | Pain localized to upper abdomen |
| R10.10 | Upper abdominal pain, unspecified |
| R10.11 | Right upper quadrant pain |
| R10.12 | Left upper quadrant pain |
| R10.13 | Epigastric pain |
| R10.2 | Pelvic and perineal pain |
| R10.3 | Pain localized to other parts of lower abdomen |
| R10.30 | Lower abdominal pain, unspecified |
| R10.31 | Right lower quadrant pain |
| R10.32 | Left lower quadrant pain |
| R10.33 | Periumbilical pain |
| R10.8 | Other abdominal pain |
| R10.81 | Abdominal tenderness |
| R10.811 | Right upper quadrant abdominal tenderness |
| R10.812 | Left upper quadrant abdominal tenderness |
| R10.813 | Right lower quadrant abdominal tenderness |
| R10.814 | Left lower quadrant abdominal tenderness |
| R10.815 | Periumbilic abdominal tenderness |
| R10.816 | Epigastric abdominal tenderness |
| R10.817 | Generalized abdominal tenderness |
| R10.819 | Abdominal tenderness, unspecified site |
| R10.82 | Rebound abdominal tenderness |
| R10.821 | Right upper quadrant rebound abdominal tenderness |
| R10.822 | Left upper quadrant rebound abdominal tenderness |
| R10.823 | Right lower quadrant rebound abdominal tenderness |
| R10.824 | Left lower quadrant rebound abdominal tenderness |
| R10.825 | Periumbilic rebound abdominal tenderness |
| R10.826 | Epigastric rebound abdominal tenderness |
| R10.827 | Generalized rebound abdominal tenderness |
| R10.829 | Rebound abdominal tenderness, unspecified site |
| R10.83 | Colic |
| R10.84 | Generalized abdominal pain |
| R10.9 | Unspecified abdominal pain |
| R11 | Nausea and vomiting |
| R11.0 | Nausea |
| R11.1 | Vomiting |
| R11.10 | Vomiting, unspecified |
| R11.11 | Vomiting without nausea |
| R11.12 | Projectile vomiting |
| R11.13 | Vomiting of fecal matter |
| R11.14 | Bilious vomiting |
| R11.2 | Nausea with vomiting, unspecified |
| R12 | Heartburn |
| R13 | Aphagia and dysphagia |
| R13.0 | Aphagia |
| R13.1 | Dysphagia |
| R13.10 | Dysphagia, unspecified |
| R13.11 | Dysphagia, oral phase |
| R13.12 | Dysphagia, oropharyngeal phase |
| R13.13 | Dysphagia, pharyngeal phase |
| R13.14 | Dysphagia, pharyngoesophageal phase |
| R13.19 | Other dysphagia |
| R14 | Flatulence and related conditions |
| R14.0 | Abdominal distension (gaseous) |
| R14.1 | Gas pain |
| R14.2 | Eructation |
| R14.3 | Flatulence |
| R15 | Fecal incontinence |
| R15.0 | Incomplete defecation |
| R15.1 | Fecal smearing |
| R15.2 | Fecal urgency |
| R15.9 | Full incontinence of feces |
| R16 | Hepatomegaly and splenomegaly, not elsewhere classified |
| R16.0 | Hepatomegaly, not elsewhere classified |
| R16.1 | Splenomegaly, not elsewhere classified |
| R16.2 | Hepatomegaly with splenomegaly, not elsewhere classified |
| R17 | Unspecified jaundice |
| R18 | Ascites |
| R18.0 | Malignant ascites |
| R18.8 | Other ascites |
| R19 | Other symptoms and signs involving the digestive system and abdomen |
| R19.0 | Intra-abdominal and pelvic swelling, mass and lump |
| R19.00 | Intra-abdominal and pelvic swelling, mass and lump, unspecified site |
| R19.01 | Right upper quadrant abdominal swelling, mass and lump |
| R19.02 | Left upper quadrant abdominal swelling, mass and lump |
| R19.03 | Right lower quadrant abdominal swelling, mass and lump |
| R19.04 | Left lower quadrant abdominal swelling, mass and lump |
| R19.05 | Periumbilic swelling, mass or lump |
| R19.06 | Epigastric swelling, mass or lump |
| R19.07 | Generalized intra-abdominal and pelvic swelling, mass and lump |
| R19.09 | Other intra-abdominal and pelvic swelling, mass and lump |
| R19.1 | Abnormal bowel sounds |
| R19.11 | Absent bowel sounds |
| R19.12 | Hyperactive bowel sounds |
| R19.15 | Other abnormal bowel sounds |
| R19.2 | Visible peristalsis |
| R19.3 | Abdominal rigidity |
| R19.30 | Abdominal rigidity, unspecified site |
| R19.31 | Right upper quadrant abdominal rigidity |
| R19.32 | Left upper quadrant abdominal rigidity |
| R19.33 | Right lower quadrant abdominal rigidity |
| R19.34 | Left lower quadrant abdominal rigidity |
| R19.35 | Periumbilic abdominal rigidity |
| R19.36 | Epigastric abdominal rigidity |
| R19.37 | Generalized abdominal rigidity |
| R19.4 | Change in bowel habit |
| R19.5 | Other fecal abnormalities |
| R19.6 | Halitosis |
| R19.7 | Diarrhea, unspecified |
| R19.8 | Other specified symptoms and signs involving the digestive system and abdomen |