ICD 9 CM Codes

520-529.9 Diseases of Oral Cavity, Salivary Glands, and Jaws
530-539.89 Diseases of Esophagus, Stomach, and Duodenum
540-543.9 Appendicitis
550-553.9 Hernia of Abdominal Cavity
555-558.9 Noninfectious Enteritis and Colitis
560-569.9 Other Diseases of Intestines and Peritoneum
570-579.9 Other Diseases of Digestive System