---
title: "ICD-10-CM Z79.891: Long term (current) use of opiate… | BillingBrief"
description: "ICD-10-CM code Z79.891: Long term (current) use of opiate analgesic. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/z79.891/"
language: "en"
---

# Z79.891 Long term (current) use of opiate analgesic

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Long term (current) use of opiate analgesic

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Also covers

-   Long term (current) use of methadone for pain management

### Includes

-   long term (current) drug use for prophylactic purposes

### Excludes2

Not part of this code, but both can be coded when both are documented.

-   methadone use NOS (F11.9-)
-   use of methadone for treatment of heroin addiction (F11.2-)
-   drug abuse and dependence (F11-F19)
-   drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)

### Code also

A second code may be needed. Sequencing depends on the encounter.

-   any therapeutic drug level monitoring ([Z51.81](https://billingbrief.com/icd10/z51.81/))
-   any follow-up examination (Z08-[Z09](https://billingbrief.com/icd10/z09/))

## Related codes

-   [`Z79.811` Long term (current) use of aromatase inhibitors ICD-10-CM](https://billingbrief.com/icd10/z79.811/)
-   [`Z79.818` Long term (current) use of other agents affecting estrogen receptors and estrogen levels ICD-10-CM](https://billingbrief.com/icd10/z79.818/)
-   [`Z79.82` Long term (current) use of aspirin ICD-10-CM](https://billingbrief.com/icd10/z79.82/)
-   [`Z79.83` Long term (current) use of bisphosphonates ICD-10-CM](https://billingbrief.com/icd10/z79.83/)
-   [`Z79.84` Long term (current) use of oral hypoglycemic drugs ICD-10-CM](https://billingbrief.com/icd10/z79.84/)
-   [`Z79.85` Long-term (current) use of injectable non-insulin antidiabetic drugs ICD-10-CM](https://billingbrief.com/icd10/z79.85/)
-   [`Z79.890` Hormone replacement therapy ICD-10-CM](https://billingbrief.com/icd10/z79.890/)
-   [`Z79.899` Other long term (current) drug therapy ICD-10-CM](https://billingbrief.com/icd10/z79.899/)

## Common questions

### Is Z79.891 a billable code?

Yes. Z79.891 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

Z79 Long term (current) drug therapy

Chapter

Factors influencing health status and contact with health services

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).