Z79 – Long term (current) drug therapy

ICD-10-CM 2027 diagnosis code · Persons with potential health hazards related to family and personal history and certain conditions influencing health status

Non-billable header

ICD-10-CM code Z79

Code: Z79 (claims format: Z79)
Description: Long term (current) drug therapy
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 21. Factors influencing health status and contact with health services (Z00-Z99)
Block: Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status

Billable codes under Z79

Z79 is a header code and cannot be used on claims. Choose the most specific code:

Z79.0 – Long term (current) use of anticoagulants and antithrombotics/antiplateletsHeader (more codes below)
Z79.1 – Long term (current) use of non-steroidal anti-inflammatories (NSAID)Billable
Z79.2 – Long term (current) use of antibioticsBillable
Z79.3 – Long term (current) use of hormonal contraceptivesBillable
Z79.4 – Long term (current) use of insulinBillable
Z79.5 – Long term (current) use of steroidsHeader (more codes below)
Z79.6 – Long term (current) use of immunomodulators and immunosuppressantsHeader (more codes below)
Z79.8 – Other long term (current) drug therapyHeader (more codes below)

Notes for Z79

Includes:

long term (current) drug use for prophylactic purposes

Excludes2 (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)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block Z77-Z99

Code also:

any follow-up examination (Z08-Z09)

Frequently asked questions

What is ICD-10 code Z79?

Z79 is the ICD-10-CM code for long term (current) drug therapy, in the block Z77-Z99 (Persons with potential health hazards related to family and personal history and certain conditions influencing health status).

Is Z79 a billable code?

No. Z79 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.