CPT code 90880 denotes hypnotherapy as a psychotherapy technique that induces an altered state of awareness to access the subconscious mind and support behavioral or emotional change. Nationally, this code matters because it identifies a distinct psychotherapy modality that some payers recognize separately from standard psychotherapy evaluation and management services, affecting coverage determinations and billing clarity across outpatient behavioral health settings. Common payers in the coverage landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the code's clinical context, typical sites of service, and where hypnotherapy fits within psychotherapy billing. The publication presents benchmarking and policy considerations relevant to national payers, clarifies common modifier and billing patterns where available, and outlines typical documentation elements tied to the therapeutic purpose of the service. Data not available in the input is noted where payer-specific policy details, associated taxonomies, and ICD-10 mappings are absent. This summary supports coding, billing, and policy teams seeking a concise reference for how CPT code 90880 is used and reported in ambulatory mental health care.