ICD-10-CM · Chapter 21 · Z00-Z99
Z79 Long term (current) drug therapy
Includes
- long term (current) drug use for prophylactic purposes
Excludes 2 (not included here)
- drug abuse and dependence (F11-F19)
- drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)
Code Also
- any therapeutic drug level monitoring (Z51.81)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| Z79..0 | Long term (current) use of anticoagulants and antithrombotics/antiplatelets | No |
| Z79..01 | Long term (current) use of anticoagulants | Yes |
| Z79..02 | Long term (current) use of antithrombotics/antiplatelets | Yes |
| Z79..1 | Long term (current) use of non-steroidal anti-inflammatories (NSAID) | Yes |
| Z79..2 | Long term (current) use of antibiotics | Yes |
| Z79..3 | Long term (current) use of hormonal contraceptives | Yes |
| Z79..4 | Long term (current) use of insulin | Yes |
| Z79..5 | Long term (current) use of steroids | No |
| Z79..51 | Long term (current) use of inhaled steroids | Yes |
| Z79..52 | Long term (current) use of systemic steroids | Yes |
| Z79..6 | Long term (current) use of immunomodulators and immunosuppressants | No |
| Z79..60 | Long term (current) use of unspecified immunomodulators and immunosuppressants | Yes |
| Z79..61 | Long term (current) use of immunomodulator | Yes |
| Z79..62 | Long term (current) use of immunosuppressant | No |
| Z79..620 | Long term (current) use of immunosuppressive biologic | Yes |
| Z79..621 | Long term (current) use of calcineurin inhibitor | Yes |
| Z79..622 | Long term (current) use of Janus kinase inhibitor | Yes |
| Z79..623 | Long term (current) use of mammalian target of rapamycin (mTOR) inhibitor | Yes |
| Z79..624 | Long term (current) use of inhibitors of nucleotide synthesis | Yes |
| Z79..63 | Long term (current) use of chemotherapeutic agent | No |
| Z79..630 | Long term (current) use of alkylating agent | Yes |
| Z79..631 | Long term (current) use of antimetabolite agent | Yes |
| Z79..632 | Long term (current) use of antitumor antibiotic | Yes |
| Z79..633 | Long term (current) use of mitotic inhibitor | Yes |
| Z79..634 | Long term (current) use of topoisomerase inhibitor | Yes |
| Z79..64 | Long term (current) use of myelosuppressive agent | Yes |
| Z79..69 | Long term (current) use of other immunomodulators and immunosuppressants | Yes |
| Z79..8 | Other long term (current) drug therapy | No |
| Z79..81 | Long term (current) use of agents affecting estrogen receptors and estrogen levels | No |
| Z79..810 | Long term (current) use of selective estrogen receptor modulators (SERMs) | Yes |
| Z79..811 | Long term (current) use of aromatase inhibitors | Yes |
| Z79..818 | Long term (current) use of other agents affecting estrogen receptors and estrogen levels | Yes |
| Z79..82 | Long term (current) use of aspirin | Yes |
| Z79..83 | Long term (current) use of bisphosphonates | Yes |
| Z79..84 | Long term (current) use of oral hypoglycemic drugs | Yes |
| Z79..85 | Long-term (current) use of injectable non-insulin antidiabetic drugs | Yes |
| Z79..89 | Other long term (current) drug therapy | No |
| Z79..890 | Hormone replacement therapy | Yes |
| Z79..891 | Long term (current) use of opiate analgesic | Yes |
| Z79..899 | Other long term (current) drug therapy | Yes |
Last reviewed: September 2026