Long term (current) drug therapy (Z79)

Browse all the diagnosis codes used for long term (current) drug therapy (z79). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.

Clinical Information

Estrogen Replacement Therapy - The use of hormonal agents with estrogen-like activity in postmenopausal or other estrogen-deficient women to alleviate effects of hormone deficiency, such as vasomotor symptoms, DYSPAREUNIA, and progressive development of OSTEOPOROSIS. This may also include the use of progestational agents in combination therapy.

Hormone Replacement Therapy - Therapeutic use of hormones to alleviate the effects of hormone deficiency.

Instructional Notations


This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

  • long term (current) drug use for prophylactic purposes

Code Also

A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.

  • any therapeutic drug level monitoring Z51.81

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

  • drug abuse and dependence F11 F19
  • drug use complicating pregnancy, childbirth, and the puerperium O99.32
  • Factors influencing health status and contact with health services (Z00–Z99)

    • Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

        • Long term (current) drug therapy (Z79)

        • Z79 Long term (current) drug therapy
        • Z79.0 Long term (current) use of anticoagulants and antithrombotics/antiplatelets
        • Z79.01 Long term (current) use of anticoagulants
        • Z79.02 Long term (current) use of antithrombotics/antiplatelets
        • Z79.1 Long term (current) use of non-steroidal anti-inflammatories (NSAID)
        • Z79.2 Long term (current) use of antibiotics
        • Z79.3 Long term (current) use of hormonal contraceptives
        • Z79.4 Long term (current) use of insulin
        • Z79.5 Long term (current) use of steroids
        • Z79.51 Long term (current) use of inhaled steroids
        • Z79.52 Long term (current) use of systemic steroids
        • Z79.6 Long term (current) use of immunomodulators and immunosuppressants
        • Z79.60 Long term (current) use of unspecified immunomodulators and immunosuppressants
        • Z79.61 Long term (current) use of immunomodulator
        • Z79.62 Long term (current) use of immunosuppressant
        • Z79.620 Long term (current) use of immunosuppressive biologic
        • Z79.621 Long term (current) use of calcineurin inhibitor
        • Z79.622 Long term (current) use of Janus kinase inhibitor
        • Z79.623 Long term (current) use of mammalian target of rapamycin (mTOR) inhibitor
        • Z79.624 Long term (current) use of inhibitors of nucleotide synthesis
        • Z79.63 Long term (current) use of chemotherapeutic agent
        • Z79.630 Long term (current) use of alkylating agent
        • Z79.631 Long term (current) use of antimetabolite agent
        • Z79.632 Long term (current) use of antitumor antibiotic
        • Z79.633 Long term (current) use of mitotic inhibitor
        • Z79.634 Long term (current) use of topoisomerase inhibitor
        • Z79.64 Long term (current) use of myelosuppressive agent
        • Z79.69 Long term (current) use of other immunomodulators and immunosuppressants
        • Z79.8 Other long term (current) drug therapy
        • Z79.81 Long term (current) use of agents affecting estrogen receptors and estrogen levels
        • Z79.810 Long term (current) use of selective estrogen receptor modulators (SERMs)
        • Z79.811 Long term (current) use of aromatase inhibitors
        • Z79.818 Long term (current) use of other agents affecting estrogen receptors and estrogen levels
        • Z79.82 Long term (current) use of aspirin
        • Z79.83 Long term (current) use of bisphosphonates
        • Z79.84 Long term (current) use of oral hypoglycemic drugs
        • Z79.85 Long-term (current) use of injectable non-insulin antidiabetic drugs
        • Z79.89 Other long term (current) drug therapy
        • Z79.890 Hormone replacement therapy
        • Z79.891 Long term (current) use of opiate analgesic
        • Z79.899 Other long term (current) drug therapy