| Clouston's (hidrotic) ectodermal dysplasia 757.31 | 
  | Clubbing of fingers 781.5 | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Clubnail (acquired) 703.8 | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Coagulation, intravascular (diffuse) (disseminated) (see also Fibrinolysis) 286.6 | 
  |  | 
  | Coagulopathy (see also Defect, coagulation) 286.9 | 
  |  | 
  | Coalition | 
  |  | 
  | Coal miners' | 
  |  | 
  | Coal workers' lung or pneumoconiosis 500 | 
  | Coarctation | 
  |  | 
  |  | 
  |  | 
  | Cocainism (see also Dependence) 304.2 | 
  | Coccidioidal granuloma 114.3 | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Coccidiosis (colitis) (diarrhea) (dysentery) 007.2 | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Coccyx - see condition | 
  | Cochin-China | 
  |  | 
  | Cock's peculiar tumor 706.2 | 
  | Cockayne's disease or syndrome (microcephaly and dwarfism) 759.89 | 
  | Cockayne-Weber syndrome (epidermolysis bullosa) 757.39 | 
  |  | 
  | Codman's tumor (benign chondroblastoma) (M9230/0) - see Neoplasm, bone, benign | 
  |  | 
  | Coffee workers' lung 495.8 | 
  |  | 
  |  | 
  | Coiling, umbilical cord - see Complications, umbilical cord | 
  | Coitus, painful (female) 625.0 | 
  |  | 
  |  | 
  |  | 
  | Coldsore (see also Herpes, simplex) 054.9 | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Colicystitis (see also Cystitis) 595.9 | 
  | Colitis (acute) (catarrhal) (croupous) (cystica superficialis) (exudative) (hemorrhagic) (noninfectious) (phlegmonous) (presumed noninfectious) 558.9 | 
  |  | 
  | Collagen disease NEC 710.9 | 
  |  | 
  | Collagenosis (see also Collagen disease) 710.9 | 
  |  | 
  |  | 
  |  | 
  | Collateral - see also condition | 
  |  | 
|  |  |