2025 ICD-10-CM Procedure Code HZ91ZZZ

Pharmacotherapy for Substance Abuse Treatment, Methadone Maintenance

ICD-10-PCS Code:: HZ91ZZZ
ICD-10-PCS Code for:: Pharmacotherapy for Substance Abuse, Methadone Maint
Is Billable?: Yes - Valid for Submission
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HZ91ZZZ is a billable procedure code used to specify the performance of pharmacotherapy for substance abuse treatment, methadone maintenance. The code is valid for the year 2025 for the submission of HIPAA-covered transactions. The procedure code involves the use of replacement medications for the treatment of addiction.

Table of Contents

Code Information
PCS Table
Clinical Classification
Convert to ICD-9-PCS
Other Similar Codes

HZ91ZZZ PCS Table

In an PCS table each code is represented by up seven alphanumeric characters, with each character in the table respresenting different aspects of the procedure. In the table provided below, each row represents an individual character and includes information about the character's position, designation, label, and procedure notes. For this PCS table the procedure code is in the substance abuse treatment section and is part of the substance abuse treatment body system, classified under pharmacotherapy type. The applicable qualifier for this procedure code is methadone maintenance.

Position	Designation	Character	Label	Procedures Notes
1	Section	H	Substance Abuse Treatment
2	Body System	Z	Substance Abuse Treatment
3	Type	9	Pharmacotherapy	Involves: The use of replacement medications for the treatment of addiction
4	Qualifier	1	Methadone Maintenance
5	Qualifier	Z	None	Explanation: The value Z is used for the fifth character to indicate that a specific qualifier does not apply to the procedure.
6	Qualifier	Z	None	Explanation: The value Z is used for the sixth character to indicate that a specific qualifier does not apply to the procedure.
7	Qualifier	Z	None	Explanation: The value Z is used for the seventh character to indicate that a specific qualifier does not apply to the procedure.

Clinical Classification

Clinical Category is Pharmacotherapy for substance use
CCSR Category Code: SUD002
Clinical Domain is Substance Use Disorder Treatment - SUD contains 4 categories that include procedures related to psychotherapy for substance use, detoxification services, counseling for substance use, in addition to medication management and pharmacotherapy for substance use.

Convert to ICD-9-PCS

The following crosswalk between ICD-10-PCS to ICD-9-PCS is based based on the General Equivalence Mappings (GEMS) information:

ICD-9-PCS: 9464 (Approximate Flag) Approximate Flag
The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.

Other ICD-10-PCS Codes Used for Pharmacotherapy Methadone Maintenance

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What is ICD-10-PCS?

The ICD-10 Procedure Coding System (ICD-10-PCS) is a catalog of procedural codes used by medical professionals for hospital inpatient healthcare settings. The Centers for Medicare and Medicaid Services (CMS) maintain the catalog in the U.S. releasing yearly updates. The 2025 ICD-10-PCS codes are to be used for discharges occurring from October 1, 2024 through September 30, 2025.

Each ICD-10-PCS code has a structure of seven alphanumeric characters and contains no decimals. The first character defines the major "section". Depending on the "section" the second through seventh characters mean different things.