- Baader's syndrome (erythema multiforme exudativum) 695.19
- Baastrup's syndrome 721.5
- Babesiasis 088.82
- Babesiosis 088.82
- Babington's disease (familial hemorrhagic telangiectasia) 448.0
- Babinski's syndrome (cardiovascular syphilis) 093.89
- Babinski-Fröhlich syndrome (adiposogenital dystrophy) 253.8
- Babinski-Nageotte syndrome 344.89
- Bacillary - see condition
- Bacilluria 791.9
- Bacillus - see also Infection, bacillus
- Back - see condition
- Backache (postural) 724.5
- Backflow (pyelovenous) (see also Disease, renal) 593.9
- Backknee (see also Genu, recurvatum) 736.5
- Bacteremia 790.7
- Bacteria
- Bacterial - see condition
- Bactericholia (see also Cholecystitis, acute) 575.0
- Bacterid, bacteride (Andrews' pustular) 686.8
- Bacteriuria, bacteruria 791.9
- Bad
