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ICD-10-CM 2027 diagnosis code

Z79Long term (current) drug therapy

Not billable — use a more specific code

Z79 is a header code, so it can't be reported by itself. Choose one of the 8 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z79

Z79 is the ICD-10-CM diagnosis code for long term (current) drug therapy. It belongs to block Z77-Z99 (persons with potential health hazards related to family and personal history and certain conditions influencing health status) and chapter 21 (factors influencing health status and contact with health services). It is a header code, so it can't be reported by itself; one of its 8 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Z79.0 (antithrombotics/antiplatelets), Z79.1 ((NSAID)), Z79.2 (antibiotics), Z79.3 (contraceptives), Z79.4 (insulin), Z79.5 (steroids), Z79.6 (immunosuppressants) and Z79.8 (therapy).

The conditions in its Excludes2 note aren't part of Z79, but may be coded alongside it if the patient has both: drug abuse and dependence (F11-F19) and drug use complicating pregnancy, childbirth, and the puerperium (O99.32-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Z79

Coding notes

IncludesFurther defines the content of the category
  • long term (current) drug use for prophylactic purposes
Excludes2Not included here — may be reported together if both conditions exist
  • drug abuse and dependence (F11-F19)
  • drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)
Code alsoTwo codes may be needed; sequencing depends on circumstances
  • any therapeutic drug level monitoring (Z51.81)

Notes that apply from higher levels

Instructions written at a parent level also apply to Z79.

Broader instructions also apply from Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status and Chapter 21: Factors influencing health status and contact with health services.

Codes whose notes reference Z79

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Z79

Is Z79 billable?

No. Z79 is a header code. Report one of its more specific subcodes instead.