Substance Abuse Treatment (HZ) ICD-10-PCS
The HZ body system covers Substance Abuse Treatment procedures on substance abuse treatment, with 66 ICD-10-PCS codes across 7 root operations, 59 of them billable in fiscal year 2027. 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 · 66 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| HZ2 | Detoxification ServicesDetoxification from alcohol and/or drugs | 2 | 1 |
| HZ3 | Individual CounselingThe application of psychological methods to treat an individual withaddictive behavior | 13 | 12 |
| HZ4 | Group CounselingThe application of psychological methods to treat two or more individualswith addictive behavior | 13 | 12 |
| HZ5 | Individual PsychotherapyTreatment of an individual with addictive behavior by behavioral,cognitive, psychoanalytic, psychodynamic or psychophysiological means | 14 | 13 |
| HZ6 | Family CounselingThe application of psychological methods that includes one or more familymembers to treat an individual with addictive behavior | 2 | 1 |
| HZ8 | Medication ManagementMonitoring and adjusting the use of replacement medications for thetreatment of addiction | 11 | 10 |
| HZ9 | PharmacotherapyThe use of replacement medications for the treatment of addiction | 11 | 10 |
The info icon shows the official root operation definition and previews the codes in that range.
About the HZ Body System
These codes cover treatment for alcohol or drug use, including detoxification, counseling, psychotherapy and replacement medications.
The third character separates detoxification services from counseling for an individual, a group or a family. It also distinguishes individual psychotherapy, which treats addictive behavior through psychological methods, from using replacement medications or monitoring and adjusting them. The fourth character adds a qualifier, such as Cognitive, Behavioral, 12-Step, Methadone Maintenance or None.
Questions About This Page
How many codes are in the HZ body system?
The HZ body system contains 66 ICD-10-PCS codes in FY 2027, organized into 7 root operations. 59 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 2027 ICD-10-PCS order file and code tables, effective October 1, 2026 through September 30, 2027.
