Z79.811 – Long term (current) use of aromatase inhibitors

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

Billable code

ICD-10-CM code Z79.811

Code: Z79.811 (claims format: Z79811)
Description: Long term (current) use of aromatase inhibitors
Billable: Yes – valid for HIPAA-covered transactions
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
Parent codes: Z79 › Z79.8 › Z79.81

Notes for Z79.811

Applicable to:

Long term (current) use of anastrozole (Arimidex)
Long term (current) use of exemestane (Aromasin)
Long term (current) use of letrozole (Femara)

Notes inherited from parent codes

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

Z79 – Long term (current) drug therapy

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)

Z79.81 – Long term (current) use of agents affecting estrogen receptors and estrogen levels

Excludes1 (not coded here):

hormone replacement therapy (Z79.890)

Code first:

, if applicable:
malignant neoplasm of breast (C50.-)
malignant neoplasm of prostate (C61)

Use additional code:

code, if applicable, to identify:
estrogen receptor positive status (Z17.0)
family history of breast cancer (Z80.3)
genetic susceptibility to malignant neoplasm (cancer) (Z15.0-)
personal history of breast cancer (Z85.3)
personal history of prostate cancer (Z85.46)
postmenopausal status (Z78.0)

Block Z77-Z99

Code also:

any follow-up examination (Z08-Z09)

Index terms for Z79.811

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in Z79.81

Frequently asked questions

What is ICD-10 code Z79.811?

Z79.811 is the ICD-10-CM code for long term (current) use of aromatase inhibitors, in the block Z77-Z99 (Persons with potential health hazards related to family and personal history and certain conditions influencing health status).

Is Z79.811 a billable code?

Yes. Z79.811 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Z79.811 belong to?

It belongs to category Z79 – Long term (current) drug therapy.

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.