S0201 Partial Hospitalization HCPCS Benchmarks

HCPCS Level II code S0201 represents per‑diem billing for partial hospitalization services delivered for less than 24 hours, typically in hospital outpatient departments and Medicare‑certified community mental health centers. This code captures intensive behavioral health treatment programs designed to provide structured daily care—such as therapy, medication management, and care coordination—for patients who need a higher level of support than standard outpatient visits but do not require 24‑hour inpatient care. Nationally, clear coding and appropriate use of S0201 are important for care alignment, program access, and consistent payment for partial hospitalization programs.

Major national payers referenced include Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare. Readers will find an overview of clinical context for partial hospitalization, common associated psychiatric diagnoses, the types of clinician taxonomies that typically deliver these services, and related psychotherapy codes used in behavioral health care. The publication also covers common modifiers and related procedure codes for service bundling and delineation where available, and notes when metadata or service line details are missing.

This summary is intended to inform coding staff, behavioral health program administrators, and policy analysts about the purpose and clinical setting for S0201, what payers typically cover such services, and where to look for adjacent procedure codes in care documentation. Data not available in the input is identified explicitly where applicable.

Billing Code Overview

HCPCS Level II code S0201 describes partial hospitalization services, less than 24 hours, billed per diem. The service falls under behavioral health / psychiatric partial hospitalization, providing structured, intensive outpatient care for patients who require more support than standard outpatient therapy but do not need full inpatient hospitalization. Typical sites of service include hospital outpatient departments and Medicare‑certified community mental health centers (CMHCs).

Clinical Context

A school-aged adolescent with worsening mood, anxiety, and impaired functioning is referred from outpatient psychiatry to a hospital outpatient partial hospitalization program (PHP). The patient presents with symptoms consistent with F32.9 (Major depressive disorder, single episode, unspecified), F41.1 (Generalized anxiety disorder), and F90.9 (Attention-deficit hyperactivity disorder, unspecified type), with intermittent behavioral dysregulation suggestive of F91.3 (Oppositional defiant disorder). The clinical workflow begins with an intake assessment by a psychiatry physician (2084P0800X) or clinical social worker (1041C0700X) in the hospital outpatient department or a Medicare-certified community mental health center. A care plan is established that includes day program therapeutic groups, individual psychotherapy, medication management, family sessions, and interdisciplinary team meetings. Services are scheduled per diem for partial hospitalization (less than 24 hours) and documented daily; billing uses HCPCS Level II code S0201 for each day of service. Clinical documentation includes daily attendance, treatment modalities delivered, measurable treatment goals, and progress notes to support medical necessity for the per diem billing.

Coding Specifications

HCPCS Level II code: S0201 — Partial hospitalization services, less than 24 hours, per diem.

National commercial averages for HCPCS Level II code S0201 show a higher average for BUCA (Average Commercial) at $367.82 compared with Medicare at $0.00. Cigna Health reports the highest mean rate at $648.65, while Blue Cross Blue Shield reports one of the lowest mean rates at $76.31.

Rate dispersion (P75 minus P25) is widest for BUCA (Average Commercial) at $369.33 and for Cigna Health effectively shows no dispersion because the 25th, 50th, and 75th percentiles are all $719.00, indicating a tightly clustered set at that level. Blue Cross Blue Shield and Aetna show moderate dispersion ($32.50 and $109.50 respectively), while UnitedHealthcare shows notable dispersion driven by a low median ($40.13) and a high 75th percentile ($320.00). The table and chart below present the full breakdown.

Related Diagnoses

F93.0 — Separation anxiety disorder of childhood

Clinical relevance: Separation anxiety can impair school and home functioning, contributing to the need for structured partial hospitalization services focused on coping skills and exposure-based interventions.
F91.3 — Oppositional defiant disorder

Clinical relevance: Behavioral dysregulation and oppositional behaviors may require intensive behavioral management, family interventions, and structured daytime programming provided by a PHP.
F41.1 — Generalized anxiety disorder

Clinical relevance: Persistent excessive anxiety and worry can be addressed within PHP through cognitive-behavioral therapy, skill-building groups, and medication management when indicated.
F32.9 — Major depressive disorder, single episode, unspecified

Clinical relevance: Depressive symptoms with functional impairment are a common indication for partial hospitalization to provide daily therapeutic intervention and close monitoring.
F90.9 — Attention-deficit hyperactivity disorder, unspecified type

Clinical relevance: ADHD symptoms affecting attention and impulsivity can be managed within PHP with behavioral strategies, psychoeducation, and coordination of pharmacologic treatment by psychiatry.

Related Codes

90846 — Family psychotherapy without patient present: used when family work occurs separately from the patient; may be provided as part of the PHP treatment plan on days when family-only sessions are scheduled. It can be an adjunct service but is billed separately from the per diem S0201 when appropriate.
90847 — Family psychotherapy with patient present: used when family therapy includes the patient; can occur within the PHP schedule and is billed separately when documented as a distinct service from the per diem.
90834 — Psychotherapy, 45 minutes with patient: individual psychotherapy session that may be provided during the PHP day; billed separately when the service is distinct from the bundled program activities and documentation supports separate billing.
90837 — Psychotherapy, 60 minutes with patient: longer individual psychotherapy that may be provided during the PHP day; billed as an alternative to 90834 when the session meets the 60-minute time requirement and is documented as distinct from the per diem.

Common usage notes: S0201 is billed per diem for the PHP day. The listed psychotherapy and family psychotherapy codes are commonly used together with S0201 when specific, separately identifiable psychotherapy or family sessions occur and documentation supports unbundling; otherwise those services may be considered included in the per diem program.

OpenPayer

Summary & Overview

HCPCS Level II S0201: Partial Hospitalization Services, Per Diem

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

National Reimbursement Benchmarks

Related Codes

Related Diagnoses

Related Codes

National Reimbursement Benchmarks

Related Codes