Z79.634

Long term (current) use of topoisomerase inhibitor

Billable / specificPOA exempt

Z79.634 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

long term (current) drug use for prophylactic purposes
Note: Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
Note: (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
Note: (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Not included here — may be reported together when both conditions exist.

long term (current) use of steroids (Z79.5-) (from Z79.6)
long term (current) use of agents affecting estrogen receptors and estrogen levels (Z79.81-) (from Z79.6)
drug abuse and dependence (F11-F19) (from Z79)
drug use complicating pregnancy, childbirth, and the puerperium (O99.32-) (from Z79)

An additional code may be needed.