Behavioral Health: Group Psychotherapy (CPB 1100, reviewed 2026-08-20)
Aetna considers behavioral health group psychotherapy medically necessary when all of the listed criteria are met. Covered CPT codes are 90849 (multiple-family group psychotherapy) and 90853 (group psychotherapy other than multiple-family), and HCPCS C7903 covers group psychotherapy provided remotely by hospital staff licensed under applicable state law when the patient is in their home and there is no associated professional service. Group size must not exceed 12 participants.