###### N21 Calculus of lower urinary tract
**_Incl.:_** with cystitis and urethritis

**N21.0 Calculus in bladder**

Calculus in diverticulum of bladder
Urinary bladder stone
**_Excl.: staghorn calculus (N20.0)_**

**N21.1 Calculus in urethra**

**N21.8 Other lower urinary tract calculus**

**N21.9 Calculus of lower urinary tract,**

**unspecified**