ICD-10-CM › N00-N99 › N20-N23 › N21 Calculus of lower urinary tract › N21.0
N21.0
Calculus in bladder
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 Calculus in bladder
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 N21 Calculus of lower urinary tract
Includes
- calculus of lower urinary tract with cystitis and urethritis
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.
- uti
- utis
- Stone
- Calculi
- Lithiasis
- Concretion
- Epicystitis
- Colicystitis
- Diverticulitis > bladder
- Impaction, impacted > calculus
- Suppuration, suppurative > bladder
- Infection, infected, infective > bladder
- Infection, infected, infective > vesical
- Inflammation, inflamed, inflammatory > bladder
- Infection, infected, infective > urinary > bladder
- Inflammation, inflamed, inflammatory > perivesical
- Cystolithiasis
- Stone > bladder
- Cystitis > calculous
- Stone > urinary > bladder
- Calculus, calculi, calculous > cystic
- Calculus, calculi, calculous > bladder
- Calculus, calculi, calculous > vesical
- Calculus, calculi, calculous > diverticulum > bladder
Codes in the same group
| Code | Description | Status |
|---|---|---|
| N21.1 | Calculus in urethra | Valid |
| N21.8 | Other lower urinary tract calculus | Valid |
| N21.9 | Calculus of lower urinary tract, unspecified | Valid |