- Malaria
- Malaria, Cerebral
- Management of children with aggression in the ED
- Management of children with developmental disabilities in the ED
- Management of children with special needs in the ED
- Mastitis
- Measles
- Meningitis
- Meningococcal Infections
- Menorrhagia
- Menstruation Disturbances
- Methicillin-Resistant Staphylococcus aureus
- Molluscum Contagiosum
- Mucocutaneous Lymph Node Syndrome
- Multiple Sclerosis
- Multiple Trauma
- Mumps
- Muscle Cramp
- Muscular Diseases
- Muscular Dystrophy, Duchenne
- Musculoskeletal Pain
- Myasthenia Gravis
- Mycobacterium tuberculosis
- Mycoplasma pneumoniae
- Myocarditis