Is Z79.811 a billable ICD-10-CM code?

Yes. Z79.811 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Z79.811 sit in the tabular list?

Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).

What cannot be coded together with Z79.811?

Z79.811 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Z79.811 (Z79.81) and apply to it just the same.

Z79.811

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

Billable / specific codeICD-10-CMPOA exempt

Z79.811 is a billable, specific ICD-10-CM code for long term (current) use of aromatase inhibitors. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

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

Excludes1 inherited from the categories above Z79.811

These are not written on Z79.811, but they bind it: a note on a category applies to every code beneath it. Billing Z79.811 with anything listed here is a denial.

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

hormone replacement therapy (Z79.890)

Excludes2 inherited from the categories above Z79.811

Also inherited, and the opposite of Excludes1: these conditions are not part of Z79.811, but a patient can have both, so you may code both.

Written on Z79 — Long term (current) drug therapy

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

Risk adjustment

Z79.811 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

Z79.811 is named in 12 Medicare coverage policies — 12 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52399Billing and Coding: Denosumab (Prolia®, Xgeva®, Jubbonti®) and biosimilars
A56907Billing and Coding: Bisphosphonate Drug Therapy
A56907Billing and Coding: Bisphosphonate Drug Therapy
A57132Billing and Coding: Bone Mass Measurement

How Z79.811 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Z79.811.

Long-term›anastrozole(Arimidex)
Long-term›aromatase inhibitors
Long-term›exemestane(Aromasin)
Long-term›letrozole(Femara)
Therapy›drug, long-term›anastrozole(Arimidex)
Therapy›drug, long-term›aromatase inhibitors
Therapy›drug, long-term›exemestane(Aromasin)
Therapy›drug, long-term›letrozole(Femara)

Code history

Z79.811 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share Z79.81. If Z79.811 is not quite right, the correct code is usually one of these.

Questions about Z79.811

Is Z79.811 a billable ICD-10-CM code?: Yes. Z79.811 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Z79.811 sit in the tabular list?: Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).
What cannot be coded together with Z79.811?: Z79.811 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Z79.811 (Z79.81) and apply to it just the same.