N27
N27 — Small kidney of unknown cause
Non-billable headerICD-10-CM
N27 is a non-billable header ICD-10-CM code for small kidney of unknown cause. It cannot be billed on its own: choose one of the more specific child codes below.
Includes
Conditions this code covers.
- oligonephronia
Other codes that can never be billed with N27
These codes carry an Excludes1 note pointing at N27. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading N27 alone.
- N26Unspecified contracted kidney
Risk adjustment
N27 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 N27
3 child codes. Green means billable.
Questions about N27
- Is N27 a billable ICD-10-CM code?
- No. N27 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does N27 sit in the tabular list?
- Diseases of the genitourinary system (N00-N99), in the block Other disorders of kidney and ureter (N25-N29).