2026 ICD-10-CM Diagnosis Code Z71.51Drug abuse counseling and surveillance of drug abuser

ICD-10-CM Codes›Z00–Z99›Z69-Z76›Z71

ICD-10-CM Z71.51
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z71.51 is a billable ICD-10-CM diagnosis code for drug abuse counseling and surveillance of drug abuser. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. Coders also document this condition as substance misuse clinical management plan agreed. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified encounters and counseling.

Code Identity

ICD-10-CM Code
Z71.51
Billable Status
Yes — Valid for Submission
Code Describes
Drug abuse counseling and surveillance of drug abuser
Short Description
Drug abuse counseling and surveillance of drug abuser
Same as the full description in the CMS dataset.
Parent Code
Z71.5
Drug abuse counseling and surveillance

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ69-Z76Persons encountering health services in other circumstances
CategoryZ71Persons encountering health services for other counseling and medical advice, not elsewhere classified
This CodeZ71.51Drug abuse counseling and surveillance of drug abuser

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z71.51.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z71.51 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Substance misuse clinical management plan agreed
  • Substance misuse monitoring status

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Abuse
      • drug NEC (non-dependent)
        • counseling and surveillance
    • Counseling(for)
      • drug abuser
    • Counseling(for)
      • substance abuse
        • drug
    • Dependence(on) (syndrome)
      • drug NEC
        • counseling and surveillance
    • Drug
      • abuse counseling and surveillance
    • Surveillance(of) (for)
      • drug abuse

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC012
Other specified encounters and counseling
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Drug Use and Addiction

Drugs are chemical substances that can change how your body and mind work. They include prescription medicines, over-the-counter medicines, alcohol, tobacco, and illegal drugs.

The full article covers:

  • What are drugs?
  • What is drug use?
  • What is drug addiction?
  • Does everyone who takes drugs become addicted?
  • Who is at risk for drug addiction?
  • What are the signs that someone has a drug problem?
  • What are the treatments for drug addiction?
  • Can drug use and addiction be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Z71.51 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V65.42 Counslng sbstn use abuse
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z71.51Overview

Is Z71.51 (Drug abuse counseling and surveillance) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report drug abuse counseling and surveillance of drug abuser on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z71.51 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because drug abuse counseling and surveillance of drug abuser describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z71.51 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for drug abuse counseling and surveillance of drug abuser on inpatient claims.

What is the ICD-9 equivalent of Z71.51?

Under the General Equivalence Mappings, drug abuse counseling and surveillance of drug abuser converts to ICD-9-CM V65.42 (counslng sbstn use abuse). The mapping is approximate, so confirm the match fits the documentation.