Billing for mental health services refers to the process of coding, submitting, and managing claims for behavioral health treatments provided by psychiatrists, psychologists, therapists, and counselors. Unlike general medical billing, it often involves time-based session codes, telehealth visits, prior authorizations, and strict insurance limitations on the number of covered sessions. Accurate use of CPT and ICD-10 codes, along with compliance with HIPAA and payer-specific requirements, is essential to avoid denials and ensure timely reimbursements.