Z90 — Acquired absence of organs, not elsewhere classified
Z90 is a non-billable header ICD-10-CM code for acquired absence of organs, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- congenital absence - see Alphabetical Index
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- postprocedural absence of endocrine glands (E89.-)
Includes
Conditions this code covers.
- postprocedural or post-traumatic loss of body part NEC
Other codes that can never be billed with Z90
These codes carry an Excludes1 note pointing at Z90. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Z90 alone.
- D73.0Hyposplenism
Risk adjustment
Z90 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.
Code to one of these instead Z90
9 child codes. Green means billable.
- Z90.0Acquired absence of part of head and neck
- Z90.1Acquired absence of breast and nipple
- Z90.2Acquired absence of lung [part of]
- Z90.3Acquired absence of stomach [part of]
- Z90.4Acquired absence of other specified parts of digestive tract
- Z90.5Acquired absence of kidney
- Z90.6Acquired absence of other parts of urinary tract
- Z90.7Acquired absence of genital organ(s)
- Z90.8Acquired absence of other organs
Questions about Z90
- Is Z90 a billable ICD-10-CM code?
- No. Z90 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Z90 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?
- Z90 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.