- Briquet's disorder or syndrome 300.81
- Brissaud's
- Brissaud-Meige syndrome (infantile myxedema) 244.9
- Brittle
- Broad - see also condition
- Brock's syndrome (atelectasis due to enlarged lymph nodes) 518.0
- Brocq's disease 691.8
- Brocq-Duhring disease (dermatitis herpetiformis) 694.0
- Brodie's
- Broken
- Bromhidrosis 705.89
- Bromidism, bromism
- Bromidrosiphobia 300.23
- Bromidrosis 705.89
- Bronchi, bronchial - see condition
- Bronchiectasis (cylindrical) (diffuse) (fusiform) (localized) (moniliform) (postinfectious) (recurrent) (saccular) 494.0
- Bronchiolectasis - see Bronchiectasis
- Bronchiolitis (acute) (infectious) (subacute) 466.19
- Bronchitis (diffuse) (hypostatic) (infectious) (inflammatory) (simple) 490
- Bronchoalveolitis 485
- Bronchoaspergillosis 117.3
- Bronchocele
