- Lardaceous
- Large
- Larsen's syndrome (flattened facies and multiple congenital dislocations) 755.8
- Larsen-Johansson disease (juvenile osteopathia patellae) 732.4
- Larva migrans
- Laryngeal - see also condition
- Laryngismus (acute) (infectious) (stridulous) 478.75
- Laryngitis (acute) (edematous) (fibrinous) (gangrenous) (infective) (infiltrative) (malignant) (membranous) (phlegmonous) (pneumococcal) (pseudomembranous) (septic) (subglottic) (suppurative) (ulcerative) (viral) 464.00
- Laryngocele (congenital) (ventricular) 748.3
- Laryngofissure 478.79
- Laryngomalacia (congenital) 748.3
- Laryngopharyngitis (acute) 465.0
- Laryngoplegia (see also Paralysis, vocal cord) 478.30
- Laryngoptosis 478.79
- Laryngospasm 478.75
- Laryngostenosis 478.74
- Laryngotracheitis (acute) (infectional) (viral) (see also Laryngitis) 464.20
- Laryngotracheobronchitis (see also Bronchitis) 490
- Laryngotracheobronchopneumonitis - see Pneumonia, broncho-
- Larynx, laryngeal - see condition
- Lasègue's disease (persecution mania) 297.9
- Lassa fever 078.89