N21.9
BillableCalculus of lower urinary tract, unspecified
N21.9 is the ICD-10-CM code for Calculus of lower urinary tract, unspecified. It is a billable, specific code valid for reimbursement.
N00-N99 Diseases of the genitourinary system
What this means — in plain language
MedlinePlus · NIHThe bladder is a hollow organ in your lower abdomen that stores urine. Many conditions can affect your bladder. Some common ones are: Cystitis - inflammation of the bladder, often from an infection Urinary incontinence - loss of bladder control Overactive bladder - a condition in which the bladder squeezes urine out at the wrong time Interstitial cystitis - a chronic problem that causes bladder pain and frequent,…
Read more about Bladder Diseases at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
- •calculus of urinary tract NOS (N20.9)
Frequently asked questions
- What is ICD-10 code N21.9?
- N21.9 is the ICD-10-CM code for "Calculus of lower urinary tract, unspecified". It falls under N00-N99 Diseases of the genitourinary system.
- Is N21.9 a billable code?
- Yes — N21.9 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from N21.9?
- Excludes1 (not coded here): calculus of urinary tract NOS (N20.9).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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