ICD-10-CM › N00-N99 › N20-N23 › N codes › N20

N20

Calculus of kidney and ureter

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 4 more specific codes instead:

  • N20.0 Calculus of kidney
  • N20.1 Calculus of ureter
  • N20.2 Calculus of kidney with calculus of ureter
  • N20.9 Urinary calculus, unspecified

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2012 Added to the draft code set draft Calculus of kidney and ureter

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

This code

Excludes1 - never coded here

  • nephrocalcinosis (E83.59)
  • that with hydronephrosis (N13.2)

Also known as

  • Calculous pyelonephritis

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.