DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

N27 Small kidney of unknown cause

  • Header · not billable

N27 is not billable. The category heads 3 billable codes in FY2027: the 3 codes directly below it.

Index → code

  • Small (ness)kidney (unknown cause) → N27.9
  • Small (ness)kidney (unknown cause)bilateral → N27.1
  • Small (ness)kidney (unknown cause)unilateral → N27.0

Where it sits

  1. Chapter 14 Diseases of the genitourinary system (N00-N99)
  2. N25-N29 Other disorders of kidney and ureter (N25-N29)
  3. N27 Small kidney of unknown cause
Billable codes
3
Subdivisions
3
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
3

Codes in N27

  1. N27.0
    Small kidney, unilateral
    Billable
  2. N27.1
    Small kidney, bilateral
    Billable
  3. N27.9
    Small kidney, unspecified
    Billable

Sources of each column.

Instructions

At N27

Includes

  • oligonephronia

Notes that also apply

Block N25-N29 instructions (Excludes2 1): printed on the block page.

Chapter 14 instructions (Excludes2 8): printed on the chapter 14 page.

Index entries

  • Small (ness)kidney (unknown cause) → N27.9
  • Small (ness)kidney (unknown cause)unilateral → N27.0
  • Small (ness)kidney (unknown cause)bilateral → N27.1

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy