Emergency: 119
AMDA-IMIC

N27 Small kidney of unknown cause

Category / Non-billable header 3 subcodes

Block: Other disorders of kidney and ureter (N25-N29)

Includes

  • oligonephronia

Subcodes

Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.

Code Description Billable
N27..0 Small kidney, unilateral Yes
N27..1 Small kidney, bilateral Yes
N27..9 Small kidney, unspecified Yes

Last reviewed: September 2026