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Z79.891 — Long term (current) use of opiate analgesic
Z79.891
What this code means
Long-term (current) use of opiate analgesic (opioid painkiller) medicines.
Also called: long term opioid use, opiate analgesic use.
When this code is used
Used for long term (current) use of opiate analgesic.
Where it sits in ICD-10-CM
Code Z79.891 belongs to Chapter 21: Factors influencing health status and contact with health services, which covers codes Z00–Z99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.
Frequently asked questions
What is ICD-10-CM code Z79.891?
Z79.891 is the ICD-10-CM diagnosis code for “Long term (current) use of opiate analgesic”. Long-term (current) use of opiate analgesic (opioid painkiller) medicines.
When is code Z79.891 used?
Used for long term (current) use of opiate analgesic. It belongs to Chapter 21 of ICD-10-CM (Factors influencing health status and contact with health services).
This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.
More codes in Chapter 21
Z00.00 — Encounter for general adult medical examination without abnormal findingsZ00.01 — Encounter for general adult medical examination with abnormal findingsZ00.129 — Encounter for routine child health examination without abnormal findingsZ01.419 — Encounter for gynecological examination (general) (routine) without abnormal findingsZ01.818 — Encounter for other preprocedural examinationZ09 — Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm