Psychiatric encounters often combine multiple billable services on the same date — an E/M visit for medication management, a psychotherapy add-on for counseling, and sometimes a diagnostic evaluation or crisis intervention. Each has its own CPT code, time requirement, and documentation standard. Payers deny same-day E/M and psychotherapy claims when the documentation does not clearly separate the medical and therapeutic components, when psychotherapy time is not recorded accurately, or when modifier 25 is applied incorrectly. Add behavioral health carve-outs, telehealth rules, and prior authorization requirements for advanced treatments, and you have a billing environment that requires daily specialization.