ICD-10-CM › N00-N99 › N20-N23 › N20 Calculus of kidney and ureter › N20.9
Urinary calculus, unspecified
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 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.
- FY2007 Added to the draft code set draft Urinary calculus, unspecified
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.
Inherited from N20 Calculus of kidney and ureter
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.
- Stone
- Gravel
- Calculi
- Lithiasis
- Concretion
- Urolithiasis
- Anuria > calculous
- Nonsecretion, urine
- Impaction, impacted > calculus
- Calculus, calculi, calculous > anuria
- Stone > urinary
- Anuria > calculous
- Calculus, calculi, calculous > anuria
- Calculus, calculi, calculous > urinary
Codes in the same group
| Code | Description | Status |
|---|---|---|
| N20.0 | Calculus of kidney | Valid |
| N20.1 | Calculus of ureter | Valid |
| N20.2 | Calculus of kidney with calculus of ureter | Valid |