Calculus in bladder
Billable / specific
N21.0 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.
Inclusion terms
Applicable to
- Calculus in diverticulum of bladder
- Urinary bladder stone
Includes (from N21)
- calculus of lower urinary tract with cystitis and urethritis
Excludes2
Not included here — may be reported together when both conditions exist.
- staghorn calculus (N20.0)
- certain conditions originating in the perinatal period (P04-P96) (from N21)
- certain infectious and parasitic diseases (A00-B99) (from N21)
- complications of pregnancy, childbirth and the puerperium (O00-O9A) (from N21)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) (from N21)
- endocrine, nutritional and metabolic diseases (E00-E88) (from N21)
- injury, poisoning and certain other consequences of external causes (S00-T88) (from N21)
- neoplasms (C00-D49) (from N21)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from N21)
Also known as
- Calculus in diverticulum of bladder
- Urinary bladder stone
- Calculus, calculi, calculous, bladder
- Calculus, calculi, calculous, cystic
- Calculus, calculi, calculous, diverticulum, bladder
- Calculus, calculi, calculous, vesical
- Cystitis, calculous
- Cystolithiasis
- Stone, bladder
- Stone, urinary, bladder
Parent code
- N21Calculus of lower urinary tractHeader