- 520-529 Diseases Of Oral Cavity, Salivary Glands, And Jaws
- 530-539 Diseases Of Esophagus, Stomach, And Duodenum
- 540-543 Appendicitis
- 550-553 Hernia Of Abdominal Cavity
- 555-558 Noninfective Enteritis And Colitis
- 560-569 Other Diseases Of Intestines And Peritoneum
- 570-579 Other Diseases Of Digestive System