Z79

Header — not billable

Long term (current) drug therapy

The ICD-10 code for long term (current) drug therapy is Z79.

Z79 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 8 more specific codes below.

Clinical notes

Code also

Two codes may be needed to fully describe a condition, but unlike Code First/Use Additional Code, the sequencing order is not mandated by convention.

any therapeutic drug level monitoring (Z51.81)

Excludes2 (not included here)

An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.

drug abuse and dependence (F11-F19)
drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)

Includes

Terms listed here further define or give examples of the conditions grouped under this code — they describe what the code covers, not a separate diagnosis.

long term (current) drug use for prophylactic purposes

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

Z79

Clinical notes

Code also

Excludes2 (not included here)

Includes

Documentation support

Child codes under Z79

Related codes in this category