ICD-10-CM
ICD-10 code for Long-term drug therapy: Z79.899
The closest CDC title for "Long-term drug therapy" is Z79.899, Other long term (current) drug therapy. Z79.899 is a billable code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
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Codes under Z79, then other CDC titles that name other long term (current) drug therapy
A header groups codes and is not billed. A billable code is one you can report.
- Z79Long term (current) drug therapyHeader
- Z79.0Long term (current) use of anticoagulants and antithrombotics/antiplateletsHeader
- Z79.01Long term (current) use of anticoagulantsBillable
- Z79.02Long term (current) use of antithrombotics/antiplateletsBillable
- Z79.1Long term (current) use of non-steroidal anti-inflammatories (NSAID)Billable
- Z79.2Long term (current) use of antibioticsBillable
- Z79.3Long term (current) use of hormonal contraceptivesBillable
- Z79.4Long term (current) use of insulinBillable
- Z79.5Long term (current) use of steroidsHeader
- Z79.51Long term (current) use of inhaled steroidsBillable
- Z79.52Long term (current) use of systemic steroidsBillable
- Z79.6Long term (current) use of immunomodulators and immunosuppressantsHeader
- Z79.60Long term (current) use of unspecified immunomodulators and immunosuppressantsBillable
- Z79.61Long term (current) use of immunomodulatorBillable
- Z79.62Long term (current) use of immunosuppressantHeader
- Z79.620Long term (current) use of immunosuppressive biologicBillable
- Z79.621Long term (current) use of calcineurin inhibitorBillable
- Z79.622Long term (current) use of Janus kinase inhibitorBillable
- Z79.623Long term (current) use of mammalian target of rapamycin (mTOR) inhibitorBillable
- Z79.624Long term (current) use of inhibitors of nucleotide synthesisBillable
- Z79.63Long term (current) use of chemotherapeutic agentHeader
- Z79.630Long term (current) use of alkylating agentBillable
- Z79.631Long term (current) use of antimetabolite agentBillable
- Z79.632Long term (current) use of antitumor antibioticBillable
- Z79.633Long term (current) use of mitotic inhibitorBillable
- Z79.634Long term (current) use of topoisomerase inhibitorBillable
- Z79.64Long term (current) use of myelosuppressive agentBillable
- Z79.69Long term (current) use of other immunomodulators and immunosuppressantsBillable
- Z79.8Other long term (current) drug therapyHeader
- Z79.81Long term (current) use of agents affecting estrogen receptors and estrogen levelsHeader
- Z79.810Long term (current) use of selective estrogen receptor modulators (SERMs)Billable
- Z79.811Long term (current) use of aromatase inhibitorsBillable
- Z79.818Long term (current) use of other agents affecting estrogen receptors and estrogen levelsBillable
- Z79.82Long term (current) use of aspirinBillable
- Z79.83Long term (current) use of bisphosphonatesBillable
- Z79.84Long term (current) use of oral hypoglycemic drugsBillable
- Z79.85Long-term (current) use of injectable non-insulin antidiabetic drugsBillable
- Z79.89Other long term (current) drug therapyHeader
- Z79.890Hormone replacement therapyBillable
- Z79.891Long term (current) use of opiate analgesicBillable
- Z79.899Other long term (current) drug therapyBillable
Code also
The CDC tabular list says a second code may be needed with this one. The note does not set which is listed first.
From Z79. A note on a category applies to every code under it.
Code also any therapeutic drug level monitoring (Z51.81)
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From Z79. A note on a category applies to every code under it.
Related conditions
Related pages
- Z79.899 code detailsNotes, nearby codes, CMS-HCC group
- Category Z79Every code under it
- Chapter 21Factors influencing health status
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Long-term drug therapy?
The closest CDC title for "Long-term drug therapy" is Z79.899, Other long term (current) drug therapy. Z79.899 is a billable code.
Is Z79.899 billable?
Yes. Z79.899 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to Z79.899?
The CDC tabular list gives 2 Excludes2 notes (may be coded together when both are documented) for Z79.899 and the categories above it. They are listed on this page.
What chapter is Z79.899 in?
Chapter 21. Factors influencing health status.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.