- Cholecystitis 575.10
- Choledochitis (suppurative) 576.1
- Choledocholith - see Choledocholithiasis
- Choledocholithiasis 574.5
- Cholelithiasis (impacted) (multiple) 574.2
- Cholemia (see also Jaundice) 782.4
- Cholemic gallstone - see Cholelithiasis
- Choleperitoneum, choleperitonitis (see also Disease, gallbladder) 567.81
- Cholera (algid) (Asiatic) (asphyctic) (epidemic) (gravis) (Indian) (malignant) (morbus) (pestilential) (spasmodic) 001.9
- Cholerine (see also Cholera) 001.9
- Cholestasis 576.8
- Cholesteatoma (ear) 385.30
- Cholesteatosis (middle ear) (see also Cholesteatoma) 385.30
- Cholesteremia 272.0
- Cholesterin
- Cholesterol
- Cholesterolemia 272.0
- Cholesterosis, cholesterolosis (gallbladder) 575.6
- Cholocolic fistula (see also Fistula, gallbladder) 575.5
- Choluria 791.4
- Chondritis (purulent) 733.99
- Chondro-osteodysplasia (Morquio-Brailsford type) 277.5