Is Z90.721 a billable ICD-10-CM code?

Yes. Z90.721 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Z90.721 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 Z90.721?

Z90.721 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 Z90.721 (Z90.7, Z90) and apply to it just the same.

Z90.721

Z90.721 — Acquired absence of ovaries, unilateral

Billable / specific codeICD-10-CMPOA exempt

Z90.721 is a billable, specific ICD-10-CM code for acquired absence of ovaries, unilateral. It is valid for submission on a claim.

Excludes1 inherited from the categories above Z90.721

These are not written on Z90.721, but they bind it: a note on a category applies to every code beneath it. Billing Z90.721 with anything listed here is a denial.

Written on Z90.7 — Acquired absence of genital organ(s)

personal history of sex reassignment (Z87.890)

Written on Z90 — Acquired absence of organs, not elsewhere classified

congenital absence - see Alphabetical Index

Excludes2 inherited from the categories above Z90.721

Also inherited, and the opposite of Excludes1: these conditions are not part of Z90.721, but a patient can have both, so you may code both.

Written on Z90.7 — Acquired absence of genital organ(s)

female genital mutilation status (N90.81-)

Written on Z90 — Acquired absence of organs, not elsewhere classified

postprocedural absence of endocrine glands (E89.-)

Risk adjustment

Z90.721 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

Z90.721 is named in 5 Medicare coverage policies — 5 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56421Billing and Coding: CT of the Abdomen and Pelvis
A57132Billing and Coding: Bone Mass Measurement
A57132Billing and Coding: Bone Mass Measurement
A59040Billing and Coding: Bone Mass Measurement

How Z90.721 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 Z90.721.

Absence›ovary›unilateral
Absence›oviduct›unilateral
Status›oophorectomy›unilateral
Status›salpingo-oophorectomy›unilateral

Code history

Z90.721 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 Z90.72. If Z90.721 is not quite right, the correct code is usually one of these.

Z90.722Acquired absence of ovaries, bilateral

Questions about Z90.721

Is Z90.721 a billable ICD-10-CM code?: Yes. Z90.721 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Z90.721 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 Z90.721?: Z90.721 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 Z90.721 (Z90.7, Z90) and apply to it just the same.