Discussions of aging and mental health widely assume that ageism among mental health providers is an important factor limiting access to mental health services for older adults. Given the widespread citation of ageism as a problem, we critically review the history of the ageism construct, and evidence for its existence in both mental health and medical professionals. There is surprisingly little empirical evidence for age bias among mental health providers. Considerable evidence does suggest differential medical treatment for older adults in such diverse areas as physician–patient interaction, use of screening procedures, and treatment of varied medical problems, although it is unclear whether age bias accounts for these differences. We suggest that innovations in delivery of psychological services, such as collaborative medical/psychological care in primary care settings, may ultimately prove more useful in improving access to mental health services than efforts to combat ageism.