N27.9 Small kidney, unspecified

Billable ICD-10-CM code, FY2026.

Applies from N27 Small kidney of unknown cause

Includes

• oligonephronia

MS-DRG index

Defines the logic of DRG(s) 698-700 in MDC 11.

Approximate ICD-9-CM (GEMs)

• 589.9 Small kidney, unspecified

Code annotations containing back-references to N27.9

Back-references to N27

• Type 1 Excludes: N26 Unspecified contracted kidney ("small kidney of unknown cause (N27.-)")

Diagnosis Index entries for N27.9

• Small (ness) › kidney (unknown cause)

Nearby codes

• N27 Small kidney of unknown cause
• N27.0 Small kidney, unilateral
• N27.1 Small kidney, bilateral
• N27.9 Small kidney, unspecified (this code)