ICD-10-CM 2027
ICD-10 code for drug abuse surveillance
From the official ICD-10-CM alphabetic index entry “Surveillance (of) (for) › drug abuse”. Page updated September 29, 2026.
About coding drug abuse surveillance
The ICD-10-CM code for drug abuse surveillance is Z71.51 (Drug abuse counseling and surveillance of drug abuser).
Within Z71.5 (drug abuse counseling and surveillance), Z71.51 is specifically for drug abuse counseling and surveillance of drug abuser. Related codes cover counseling for family member of drug abuser (Z71.52).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about drug abuse surveillance ICD-10 codes
What is the ICD-10 code for drug abuse surveillance?
- Z71.51 — Drug abuse counseling and surveillance of drug abuser.
Is Z71.51 billable?
- Yes. Z71.51 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z71.51 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z71.51 a CC or MCC?
- No. Z71.51 is neither a CC nor an MCC under MS-DRG v44.0.