Z79 — Long term (current) drug therapy

Not billable

Is Z79 billable?

No — Z79 is a non-billable header code. Z79 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 32 billable codes beneath Z79.

Billable codes under this header

Z79 at a glance

Code	Z79
Description	Long term (current) drug therapy
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes2 — not included here

The conditions below are not part of Z79, but a patient may have both at the same time. When documentation supports it, Z79 and the excluded code may both be reported.

drug abuse and dependence (F11-F19)
drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)

Code also

Two codes may be needed to describe the condition fully. Whether Z79 is sequenced first depends on the reason for the encounter.

any therapeutic drug level monitoring (Z51.81)

Includes

Conditions classified to Z79.

long term (current) drug use for prophylactic purposes

Code also — inherited from Z77-Z99

Two codes may be needed to describe the condition fully. Whether Z79 is sequenced first depends on the reason for the encounter.

any follow-up examination (Z08-Z09)

What codes fall under Z79? (8)

How long has Z79 existed?

Z79 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.