Z79
ICD-10Non-billable categoryLong term (current) drug therapy
Official ICD-10-CM descriptor (FY2026)
Long term (current) drug therapy
Z79 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Includes
- long term (current) drug use for prophylactic purposes
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- drug abuse and dependence (F11-F19)
- drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)
Code also
Two codes may be needed; sequencing depends on the reason for the encounter.
- any therapeutic drug level monitoring (Z51.81)
More specific codes under Z79
- Z79.0Long term (current) use of antocoag/antithrom/angiplatecategory
- Z79.1Long term (current) use of non-steroidal non-inflam (NSAID)
- Z79.2Long term (current) use of antibiotics
- Z79.3Long term (current) use of hormonal contraceptives
- Z79.4Long term (current) use of insulin
- Z79.5Long term (current) use of steroidscategory
- Z79.6Long term (crnt) use of immunomodulator & immunosuppressantcategory
- Z79.8Other long term (current) drug therapycategory
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.