---
title: "ICD-10-CM Z79.890: Hormone replacement therapy | BillingBrief"
description: "ICD-10-CM code Z79.890: Hormone replacement therapy. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/z79.890/"
language: "en"
---

# Z79.890 Hormone replacement therapy

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

**Official ICD-10-CM description:** Hormone replacement therapy

## Coding notes

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

### Includes

-   long term (current) drug use for prophylactic purposes

### Excludes2

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

-   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/)
-   [`Z79.891` Long term (current) use of opiate analgesic ICD-10-CM](https://billingbrief.com/icd10/z79.891/)
-   [`Z79.899` Other long term (current) drug therapy ICD-10-CM](https://billingbrief.com/icd10/z79.899/)

## Common questions

### Is Z79.890 a billable code?

Yes. Z79.890 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/).