N21.9
BillableCalculus of lower urinary tract, unspecified
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A kidney stone or mineral deposit in the bladder or urethra when the specific location is not documented.
Coding Tips
- •Query the provider if stone location (bladder vs urethra) is documented elsewhere in the record
- •Review imaging reports to determine if a more specific N21 code applies
Excludes 1 — Do NOT code together
- calculus of urinary tract NOS (N20.9)
Code Hierarchy
└N21Calculus of lower urinary tract└N21.9Calculus of lower urinary tract, unspecified
└N21.9Calculus of lower urinary tract, unspecified