Lymphatic system

Lymphedema

Lymphomas, malignant

Macular degeneration

Magnetic resonance imaging (MRI)

Mainstreaming

Malabsorption syndrome

Malaria

Malingering

Malnutrition

Malocclusion

Mammography

Managed Care

Marfan's syndrome

Marriage

Massage

Mastectomy

Masturbation

Measles

Medical ethics

Medical malpractice

Medicare and Medicaid

Meditation

Men's health

Meniere's disease

Meningitis

Menopause

Menstrual disorders

Menstruation

Mental health

Mental illness

Mental retardation

Metabolic acidosis

Metabolic alkalosis

Metabolism

Midwifery

Migrant Health

Military Medicine

Mineral deficiency

Mineral toxicity

Minerals

Minority health

Moles

Monoamine oxidase inhibitors

Mood disorders

Morphine

Motion sickness

Motor development

Motor vehicle safety

Movement disorders