N21
Non-billableCalculus of lower urinary tract
N21 is the ICD-10-CM code for Calculus of lower urinary tract. It is a non-billable category code — use a more specific child code such as N21.0 for billing.
- Status
- Header (non-billable)
- Chapter
- N00-N99
- Subcodes
- 4
- Edition
- FY2026
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.
Includes
- •calculus of lower urinary tract with cystitis and urethritis
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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