Z79.899 Other long term (current) drug therapy

The ICD-10-CM code for Other long term (current) drug therapy is Z79.899 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

21: Factors influencing health status and contact with health services (Z00-Z99)

Section

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

Category Z79

41 codes (32 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to Z79.899:

• Prophylactic › medication
• Long-term (current) (prophylactic) drug therapy (use of) › drug, specified NEC
• Prophylactic › administration of › drug
• Therapy › drug, long-term (current) (prophylactic) › drug, specified NEC

U.S. Hospital Utilization

• An estimated 7,627,765 U.S. inpatient stays in 2023 included Z79.899 among the documented diagnoses.
• 85 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

HIV disease/HIV+ managed by antiretroviral medication

(j) HIV disease or HIV positive status managed by antiretroviral medication If a patient with documented HIV disease, HIV-related illness or AIDS is currently managed on antiretroviral medications, assign code B20, Human immunodeficiency virus [HIV] disease. If a patient with documented HIV positive status is currently managed on antiretroviral medication, assign code Z21, Asymptomatic human immunodeficiency virus [HIV] infection status, in the absence of any additional documentation of HIV disease, HIV-related illness or AIDS. Code Z79.899, Other long term (current) drug therapy, may be assigned as an additional code to identify the long-term (current) use of antiretroviral medications.

Used with any code in range A00.0-T88.9, Z00-Z99

1) Used with any code in the range of A00.0-T88.9, Z00-Z99 An external cause code may be used with any code in the range of A00.0-T88.9, Z00-Z99, classification that represents a health condition due to an external cause. Though they are most applicable to injuries, they are also valid for use with such things as infections or diseases due to an external source, and other health conditions, such as a heart attack that occurs during strenuous physical activity.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference Z79.899 with the canonical source and edition:

Z79.899 — Other long term (current) drug therapy. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/Z79.899

Canonical URL: https://icd10codingpro.com/codes/Z79.899