Substance Abuse Treatment (HZ) ICD-10-PCS
The HZ body system covers Substance Abuse Treatment procedures on substance abuse treatment, with 132 ICD-10-PCS codes across 7 root operations, 118 of them billable in fiscal year 2026. Each root operation defines a distinct procedural objective, and the info icons show the official definition with a preview of the codes inside.
Root Operations in This Body System 7 operations · 132 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| HZ2 | Detoxification ServicesDetoxification from alcohol and/or drugs | 4 | 2 |
| HZ3 | Individual CounselingThe application of psychological methods to treat an individual withaddictive behavior | 26 | 24 |
| HZ4 | Group CounselingThe application of psychological methods to treat two or more individualswith addictive behavior | 26 | 24 |
| HZ5 | Individual PsychotherapyTreatment of an individual with addictive behavior by behavioral,cognitive, psychoanalytic, psychodynamic or psychophysiological means | 28 | 26 |
| HZ6 | Family CounselingThe application of psychological methods that includes one or more familymembers to treat an individual with addictive behavior | 4 | 2 |
| HZ8 | Medication ManagementMonitoring and adjusting the use of replacement medications for thetreatment of addiction | 22 | 20 |
| HZ9 | PharmacotherapyThe use of replacement medications for the treatment of addiction | 22 | 20 |
The info icon shows the official root operation definition and previews the codes in that range.
About the HZ Body System
The ICD-10-PCS root operation Substance Abuse Treatment (Code prefix HZ) encompasses a range of services aimed at addressing addiction and dependency disorders. This classification focuses on therapeutic and medical management strategies to treat substance abuse.
Within this body system, the codes specify various treatment methods including Detoxification Services (HZ2), which involve medically supervised withdrawal from alcohol or drugs. Psychological interventions are also represented through Individual Counseling (HZ3) and Group Counseling (HZ4), where behavioral approaches target addictive behaviors in one or multiple patients respectively. More intensive care is provided via Individual Psychotherapy (HZ5) and Family Counseling (HZ6), leveraging different therapeutic modalities to support the patient's recovery. Additionally, Medication Management (HZ8) and Pharmacotherapy (HZ9) address the use and adjustment of replacement medications, integral for treating addiction. These specific codes enable accurate documentation and coding for the full spectrum of substance abuse treatment interventions.
Questions About This Page
How many codes are in the HZ body system?
The HZ body system contains 132 ICD-10-PCS codes in FY 2026, organized into 7 root operations. 118 of them are billable on inpatient claims.
What is a root operation?
The root operation is the third character of every ICD-10-PCS code and names the objective of the procedure. Drainage takes fluid out, Excision cuts out a portion of a body part, and Resection removes all of one. Picking the right root operation is the central skill of PCS coding, so each one above carries its official CMS definition.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
