- Microgenitalia (congenital) 752.89
- Microglioma (M9710/3)
- Microglossia (congenital) 750.16
- Micrognathia, micrognathism (congenital) 524.00
- Microgyria (congenital) 742.2
- Microinfarct, heart (see also Insufficiency, coronary) 411.89
- Microlithiasis, alveolar, pulmonary 516.2
- Micromastia 611.82
- Micromyelia (congenital) 742.59
- Micropenis 752.64
- Microphakia (congenital) 743.36
- Microphthalmia (congenital) (see also Microphthalmos) 743.10
- Microphthalmos (congenital) 743.10
- Micropsia 368.14
- Microsporidiosis 136.8
- Microsporon furfur infestation 111.0
- Microsporosis (see also Dermatophytosis) 110.9
- Microstomia (congenital) 744.84
- Microthelia 757.6
- Microthromboembolism - see Embolism
- Microtia (congenital) (external ear) 744.23
- Microtropia 378.34
