A geriatric physician, also called a geriatrician, is a medical doctor who specializes in the diagnosis, geriatric treatment, and prevention of disease and disability in older adults. Geriatric physicians are primary care doctors who are specially trained in the aging process. Depression in seniors has impacts, which are different than younger people. In the elderly, depression often occurs with other medical illnesses and disabilities and lasts longer. Depression in old age often increases their risk of cardiac diseases. Depression is associated with an increased risk of cardiac diseases and an increased risk of death from illness. At the same time, depression reduces an elderly person's ability to rehabilitate. Studies of nursing home patients with physical illnesses have shown that the presence of depression substantially increases the likelihood of death from those illnesses. Depression also has been associated with increased risk of death following a heart attack. For that reason, it is important to make sure that an elderly person you are concerned about is evaluated and treated, even if the depression is mild. There is no single cause of depression in any age group. Some research indicates that there could be a genetic link to the disease. However, biological, social, and psychological factors all play a role in depression in the elderly. Depression is often the cause of physical pain in the elderly that is not explained by other medical conditions. Proper diagnosis and treatment of geriatric depression can be difficult. The elderly's first point of contact is typically their regular doctor.