HCPCS Code H0035: Mental Health Partial Hospitalization, Treatment, Less Than 24 Hours

HCPCS code H0035 is used for billing partial hospitalization programs that provide structured, intensive treatment for mental health conditions less than 24 hours per day. It covers day treatment services designed for patients needing more care than outpatient therapy but less than inpatient care or a residential treatment program.

CPT code 90834 is used by mental health professionals for individual therapy or psychotherapy sessions lasting approximately 45 minutes. It covers outpatient therapy where a clinician provides one-on-one mental health treatment, including assessment, counseling, and psychotherapy.

The CPT code commonly used for Intensive Outpatient Program (IOP) mental health services is 90853. It represents group therapy for patients requiring structured treatment multiple days a week without overnight stay, offering more support than standard outpatient care but less time commitment than inpatient psychiatric care or a drug treatment program.