Each year about 30% of Americans have a diagnosable mental disorder andare thought toneed mental health care. Yet only about one-third of these persons become engaged in care, and only about one-third of these receive care of reasonably high quality. To illustrate the magnitude of these gaps: imagine that a population roughly equivalent to that of the four largest states combined (California, Texas, New York, and Florida) needs mental health care, but only those in California receive any care at all. And among Californians, only those living in Los Angeles County receive care of at least reasonable, not necessarily optimal, quality. My point is that very large segments of the population do not make it across one of these gaps. Most studies find that only about one in ten persons who need care for common mental disorders actually receive good-quality care.