HZ91ZZZPharmacotherapy for Substance Abuse Treatment, Methadone Maintenance

Substance Abuse Treatment›Substance Abuse Treatment›Pharmacotherapy
  • Billable / Specific Code
ICD-10-PCS HZ91ZZZ
CMS Source: FY 2026 ICD-10-PCS dataset. Effective Oct 1, 2025 – Sep 30, 2026.FacebookXLinkedInPrint

HZ91ZZZ is a billable ICD-10-PCS procedure code for Pharmacotherapy for Substance Abuse Treatment, Methadone Maintenance. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The root operation Pharmacotherapy involves the use of replacement medications for the treatment of addiction.

Code Identity

ICD-10-PCS Code
HZ91ZZZ
Billable Status
Yes — Valid for Submission
Code Describes
Pharmacotherapy for Substance Abuse Treatment, Methadone Maintenance
Parent Code
HZ9 Substance Abuse Treatment, Pharmacotherapy
Short Description
Pharmacotherapy for Substance Abuse, Methadone Maint

PCS Table Breakdown

Each ICD-10-PCS code is built from seven characters, each an axis of the procedure. Hover or tap the icons for the official CMS definitions.

PositionDesignationValueMeaning
1SectionHSubstance Abuse Treatment
2Body SystemZSubstance Abuse Treatment
3Type9Pharmacotherapy
4Qualifier1Methadone Maintenance
5QualifierZNone
6QualifierZNone
7QualifierZNone

Convert to ICD-9-PCS

Closest ICD-9-PCS equivalents for HZ91ZZZ under the General Equivalence Mappings.

94.64
Approximate match.

Similar Procedure Codes

Questions About HZ91ZZZ

Is HZ91ZZZ a billable code?

Yes. HZ91ZZZ is a complete seven-character ICD-10-PCS code, specific enough to report Pharmacotherapy for Substance Abuse Treatment, Methadone Maintenance on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in HZ91ZZZ mean?

HZ91ZZZ breaks down character by character: the 1st character H is the Section (Substance Abuse Treatment); the 2nd character Z is the Body System (Substance Abuse Treatment); the 3rd character 9 is the Type (Pharmacotherapy); the 4th character 1 is the Qualifier (Methadone Maintenance); the 5th character Z is the Qualifier (None); the 6th character Z is the Qualifier (None); the 7th character Z is the Qualifier (None).

What is the ICD-9-PCS equivalent of HZ91ZZZ?

Under the General Equivalence Mappings, Pharmacotherapy for Substance Abuse Treatment, Methadone Maintenance crosswalks to ICD-9-PCS 94.64. The mapping is approximate, so confirm it fits the documentation.