- CRST syndrome (cutaneous systemic sclerosis) 710.1
- Cruchet's disease (encephalitis lethargica) 049.8
- Cruelty in children (see also Disturbance, conduct) 312.9
- Crural ulcer (see also Ulcer, lower extremity) 707.10
- Crush, crushed, crushing (injury) 929.9
- Crusta lactea 690.11
- Crusts 782.8
- Crutch paralysis 953.4
- Cruveilhier's disease 335.21
- Cruveilhier-Baumgarten cirrhosis, disease, or syndrome 571.5
- Cruz-Chagas disease (see also Trypanosomiasis) 086.2
- Cryoglobulinemia (mixed) 273.2
- Crypt (anal) (rectal) 569.49
- Cryptitis (anal) (rectal) 569.49
- Cryptococcosis (European) (pulmonary) (systemic) 117.5
- Cryptococcus 117.5
- Cryptopapillitis (anus) 569.49
- Cryptophthalmos (eyelid) 743.06
- Cryptorchid, cryptorchism, cryptorchidism 752.51
- Cryptosporidiosis 007.4
- Cryptotia 744.29
- Crystallopathy
