• Ma huang/ ephedra toxicity
  • MAC [mycobacterium avium complex]
  • Macrocytic anemia
  • Mad cow disease
  • MAI [mycobacterium avium-intracellulare]
  • Malaria infection
  • Male factor infertility
  • Malignant hypertension
  • Malignant hyperthermia
  • Malignant melanoma
  • Malleolar fractures
  • Mallory-Weiss tear
  • Malnutrition, protein-calorie
  • MALT lymphoma
  • Manic-depression
  • Marfan syndrome
  • Mastalgia
  • Mastitis and breast abscess
  • Maternal-fetal health
  • Maturity onset diabetes of the young
  • MCD [Minimal change disease]
  • MCL [medial collateral ligament] injury
  • MCTD [mixed connective tissue disease]
  • MDD
  • MDMA abuse
  • MDS [myelodysplastic syndrome]
  • Measles infection
  • Meckel diverticulum
  • Medial collateral ligament injury
  • Medial epicondylitis
  • Median nerve neuropathy
  • Medullary carcinoma, thyroid
  • Medullary sponge kidney
  • Medulloblastoma
  • Meibomian gland disorders
  • Melanoma
  • Melasma
  • Membranous nephropathy
  • MEN [multiple endocrine neoplasia]
  • Meniere disease
  • Meningioma
  • Meningitis, cryptococcal
  • Meningitis, fungal
  • Meningocele
  • Meningococcal disease
  • Meningomyelocele
  • Meniscal tear
  • Menopause
  • Menopause, premature
  • Menstrual disorders
  • Menstrual pain (evaluation of)
  • Mental health response to disasters/other critical incidents
  • Mental status changes
  • MERS
  • Mesenteric ischemia
  • Mesothelioma
  • Metabolic syndrome
  • Metastatic breast cancer
  • Methamphetamine abuse
  • Metrorrhagia
  • MF [myocsis fungoides]
  • MGUS [monoclonal gammopathy of undetermined significance]
  • MI [myocardial infarction]
  • Micturation syncope
  • Middle ear dysfunction
  • Middle east respiratory syndrome
  • Migraine headache in adults
  • Migraine headache in children
  • Migraine, pediatric
  • Miliaria
  • Milk intolerance
  • Mineralocorticoid deficiency
  • Mini-stroke
  • Minimal change disease
  • Miscarriage
  • Mitral regurgitation
  • Mitral stenosis
  • Mitral valve prolapse
  • Mixed connective tissue disease
  • Mobitz AV block
  • MODY [maturity onset diabetes of the young]
  • Molar pregnancies
  • Moles
  • Molestation
  • Molluscum contagiosum
  • Monoclonal gammopathy of undetermined significance
  • Mononeuritis multiplex
  • Mononucleosis
  • Morbid obesity, adult
  • Motion sickness
  • Mouth ulcers (evaluation of)
  • Mouth, angular cheilitis
  • MR [mitral regurgitation]
  • MRSA
  • MS [multiple sclerosis]
  • Mucocutaneous candidiasis
  • Mucocutaneous lymph node syndrome
  • Mucopolysaccharidoses
  • Mucormycosis
  • Multi-focal atrial tachycardia
  • Multi-infarct dementia
  • Multiple endocrine neoplasia syndromes
  • Multiple myeloma
  • Multiple sclerosis
  • Mumps
  • Munchausen syndrome
  • Muscle cramps
  • Muscular dystrophies
  • Musculoskeletal chest pain
  • Musculoskeletal lower back pain
  • Musculoskeletal sprains and strains
  • MVP [mitral valve prolapse]
  • Myasthenia gravis
  • Mycobacterium avium-intracellulare
  • Mycobacterium leprae
  • Mycoplasma infection
  • Mycoplasma pneumoniae
  • Mycosis fungoides
  • Myelodysplastic syndrome
  • Myelofibrosis
  • Myocardial infarction
  • Myocarditis
  • Myofascial pain, chronic