| Crabs, meaning pubic lice 132.2 | 
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  | Cracked | 
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  | Cranial - see condition | 
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  | Craniofenestria (skull) 756.0 | 
  | Craniolacunia (skull) 756.0 | 
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  | Craniopathy, metabolic 733.3 | 
  | Craniopharyngeal - see condition | 
  | Craniopharyngioma (M9350/1) 237.0 | 
  | Craniorachischisis (totalis) 740.1 | 
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  | Craniotabes (cause unknown) 733.3 | 
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  | Cranium - see condition | 
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  | CRBSI (catheter-related bloodstream infection ) 999.31 | 
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  | Creeping | 
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  | Crepitus | 
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  | Crescent or conus choroid, congenital 743.57 | 
  | Cretin, cretinism (athyrotic) (congenital) (endemic) (metabolic) (nongoitrous) (sporadic) 243 | 
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  | Cretinoid degeneration 243 | 
  | Creutzfeldt-Jakob disease (CJD) (syndrome) 046.19 | 
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  | Crigler-Najjar disease or syndrome (congenital hyperbilirubinemia) 277.4 | 
  | Crimean hemorrhagic fever 065.0 | 
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  | Crisis | 
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  | Crocq's disease (acrocyanosis) 443.89 | 
  | Crohn's disease (see also Enteritis, regional) 555.9 | 
  | Cronkhite-Canada syndrome 211.3 | 
  | Crooked septum, nasal 470 | 
  | Cross | 
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  | Crossed ectopia of kidney 753.3 | 
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  | Croup, croupous (acute) (angina) (catarrhal) (infective) (inflammatory) (laryngeal) (membranous) (nondiphtheritic) (pseudomembranous) 464.4 | 
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  | Crouzon's disease (craniofacial dysostosis) 756.0 | 
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