A licensed therapist is a mental health professional who has earned a license to practice psychotherapy or counseling. This means that they have completed specific educational and clinical requirements, passed a standardized examination, and met any other criteria set by their state's regulatory board for the profession (e.g., the Board of Psychology). A licensed therapist is authorized to diagnose mental health disorders, develop treatment plans, and provide psychotherapy or counseling services to individuals, families, or groups seeking help with a variety of issues such as anxiety, depression, relationship problems, substance abuse, and more.