Dr. Frank Lehninger is a geriatric psychiatrist practicing in Naples, FL. Dr. Lehninger specializes in the diagnosis and treatment of mental disorders, particularly in older adults. Patients who visit geriatric psychiatrists typically look for help with problems like memory loss, depression, difficulty coping with change, stress, dementia, anxiety and more. Older adults may also experience emotional distress after being diagnosed with a disease as well. Dr. Lehninger helps patients after a comprehensive diagnostic exam so the root of their problems can be treated.