Z79.890 — Hormone replacement therapy
Is Z79.890 billable?
Yes — Z79.890 is billable for FY2027. Z79.890 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z79.890 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Z79.890 at a glance
| Code | Z79.890 |
|---|---|
| Description | Hormone replacement therapy |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to Z79.890?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z79.890 directly.
CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.
Which MS-DRGs does Z79.890 group to?
Z79.890 sits in MDC 23 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 951Other Factors Influencing Health Statusmedical
How is Z79.890 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z79.890. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Long-term › hormone replacement (current) (prophylactic) drug therapy (use of)
- Therapy › drug, long-term › hormone replacement
Excludes2 — not included here — inherited from Z79
The conditions below are not part of Z79.890, but a patient may have both at the same time. When documentation supports it, Z79.890 and the excluded code may both be reported.
Code also — inherited from Z77-Z99
Two codes may be needed to describe the condition fully. Whether Z79.890 is sequenced first depends on the reason for the encounter.
- any follow-up examination (Z08-Z09)
Code also — inherited from Z79
Two codes may be needed to describe the condition fully. Whether Z79.890 is sequenced first depends on the reason for the encounter.
- any therapeutic drug level monitoring (Z51.81)
How long has Z79.890 existed?
Z79.890 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
- FY2018Hormone replacement therapy (postmenopausal)Hormone replacement therapy
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.