ICD-10-PCS Code For Substance Abuse: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group HZ2Z includes procedures performed to detoxify patients receiving treatment for substance abuse. These ICD-10-PCS codes are used for inpatient documentation when medically supervised removal of intoxicating substances and management of withdrawal is provided during an inpatient stay. Accurate coding within the ICD-10-PCS HZ2Z group is essential for proper inpatient reimbursement, as it captures the detoxification services performed and supports clinical documentation accuracy.

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Substance Abuse Detoxification Procedure Overview

This code group includes procedures that deliver detoxification services for patients undergoing treatment for substance use disorders. The procedures do not target an anatomical body system but focus on medically supervised removal of intoxicating substances and management of withdrawal. Accurate coding ensures inpatient records reflect the detoxification services provided and supports appropriate reimbursement and case mix assignment.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
H	Section	Substance Abuse Treatment
Z	Body System	None
2	Operation	Detoxification Services
Z	Body Part	None

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ICD-10-PCS Code For Substance Abuse: Procedure Code Group Overview

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Substance Abuse Detoxification Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
H	Section	Substance Abuse Treatment
Z	Body System	None
2	Operation	Detoxification Services
Z	Body Part	None

When to Use

Use codes from this group when an inpatient receives medically supervised detoxification for alcohol or drug withdrawal. Assign these codes when the primary procedure performed during the inpatient stay is detoxification services rather than treatment directed at an anatomical site.

ICD-10-PCS Codes

1 rows

ICD-10-PCS Code	Description
HZ2ZZZZ	Detoxification Services for Substance Abuse Treatment

Typical Clinical Scenarios

A 45-year-old patient presents to the emergency department with severe alcohol withdrawal characterized by agitation, tremors, diaphoresis, and risk of progression to delirium tremens. After medical stabilization and decision for inpatient management of withdrawal, medically supervised detoxification services are provided to remove intoxicating alcohol effects and manage physiological withdrawal symptoms. The inpatient stay focuses on close monitoring, medication management, and supportive care to safely complete detoxification. Typical codes: HZ2ZZZZ
A 30-year-old patient is admitted electively for a planned inpatient program to undergo supervised detoxification from opioids following failed outpatient attempts and high risk of relapse. The admission is for structured medical detoxification with protocolized withdrawal management, symptom control medications, and monitoring to achieve stabilization before transfer to longer-term treatment. The primary inpatient procedure is medically supervised detoxification to ensure safe removal of opioids and management of withdrawal. Typical codes: HZ2ZZZZ
A 55-year-old patient with chronic benzodiazepine dependence develops prolonged, complicated withdrawal with persistent seizures and autonomic instability after an incomplete outpatient taper. The patient requires readmission for an extended inpatient detoxification course to manage refractory withdrawal, titration of replacement therapy, and prevention of complications. Inpatient detoxification services are provided to control withdrawal physiology and stabilize the patient. Typical codes: HZ2ZZZZ

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-PCS Codes

1 rows

ICD-10-PCS Code	Description
HZ2ZZZZ	Detoxification Services for Substance Abuse Treatment

Typical Clinical Scenarios

A 45-year-old patient presents to the emergency department with severe alcohol withdrawal characterized by agitation, tremors, diaphoresis, and risk of progression to delirium tremens. After medical stabilization and decision for inpatient management of withdrawal, medically supervised detoxification services are provided to remove intoxicating alcohol effects and manage physiological withdrawal symptoms. The inpatient stay focuses on close monitoring, medication management, and supportive care to safely complete detoxification. Typical codes: HZ2ZZZZ
A 30-year-old patient is admitted electively for a planned inpatient program to undergo supervised detoxification from opioids following failed outpatient attempts and high risk of relapse. The admission is for structured medical detoxification with protocolized withdrawal management, symptom control medications, and monitoring to achieve stabilization before transfer to longer-term treatment. The primary inpatient procedure is medically supervised detoxification to ensure safe removal of opioids and management of withdrawal. Typical codes: HZ2ZZZZ
A 55-year-old patient with chronic benzodiazepine dependence develops prolonged, complicated withdrawal with persistent seizures and autonomic instability after an incomplete outpatient taper. The patient requires readmission for an extended inpatient detoxification course to manage refractory withdrawal, titration of replacement therapy, and prevention of complications. Inpatient detoxification services are provided to control withdrawal physiology and stabilize the patient. Typical codes: HZ2ZZZZ

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-PCS Code For Substance Abuse: Procedure Code Group Overview

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Substance Abuse Detoxification Procedure Overview

Code Attributes

ICD-10-PCS Code For Substance Abuse: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Substance Abuse: Procedure Code Group Overview policy alerts

Substance Abuse Detoxification Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

What procedures are included in the HZ2Z ICD-10-PCS code group?

Which ICD-10-PCS code represents Detoxification Services for Substance Abuse Treatment?

What section and operation attributes are assigned to this code group?

How does accurate coding within the HZ2Z group affect inpatient records?

Are there related DRGs listed for the HZ2Z code group?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

What procedures are included in the HZ2Z ICD-10-PCS code group?

Which ICD-10-PCS code represents Detoxification Services for Substance Abuse Treatment?

What section and operation attributes are assigned to this code group?

How does accurate coding within the HZ2Z group affect inpatient records?

Are there related DRGs listed for the HZ2Z code group?

References