The founding members of the Coalition for Psychotherapy Parity present Clinical Necessity Guidelines for Psychotherapy, Insurance Medical Necessity and Utilization Review Protocols, and Mental Health Parity. These guidelines support access to psychotherapy as prescribed by the clinician without arbitrary limitations on duration or frequency. The authors of the guidelines first review the evidence that psychotherapy is effective, cost-effective, and often provides a cost-offset in decreased overall medical expenses, morbidity, mortality, and disability. They highlight the disparity between clinicians' knowledge of generally accepted standards of care for mental health and substance use disorders and the much more limited "crisis stabilization" focus of many insurance companies. The clinical trials that health insurers cite as justification for authorizing only brief treatment for all patients involve highly selected, atypical populations that are not representative of the general population of patients in need of mental health care, who typically have complex conditions and chronic, recurring symptoms requiring ongoing availability of treatment. The standard for other medical conditions reimbursed by insurance is continuation of effective treatment until meaningful recovery, which is therefore the standard required by the Mental Health Parity and Addiction Equity Act for mental health care. However, insurance companies frequently evade the legal requirement to cover treatment of mental illness at parity with other medical conditions. They do this by applying inaccurate proprietary definitions of medical necessity and imposing utilization review procedures much more restrictively for mental health treatment than for other medical care to block access to ongoing care, thus containing insurance company costs in the short term without consideration of the adverse sequelae of undertreated illness (eg, increased costs of other medical services and increased morbidity, mortality, and costs to society in increased disability). The authors of the guidelines conclude that, given appropriate medical necessity guidelines at parity with other medical care, consistent with provider expertise and a broad range of psychotherapy research, there would be no need or place for utilization review protocols. Individuals and psychotherapy organizations are invited to visit the website psychotherapyparity.org to sign on to the guidelines to indicate agreement and support.