2025 ICD-10-CM code N22
(Active) Effective Date: N/A Revision Date: N/A Deletion Date: N/A Diseases of the genitourinary system - Urolithiasis (N20-N23) Diseases of the genitourinary system (N00-N99) Feed
Calculus of urinary tract in diseases classified elsewhere. Code first the underlying disease.
Modifiers may be applicable depending on the circumstances of the diagnosis and treatment.Consult the CPT and HCPCS coding manuals for appropriate modifier use.
Medical necessity for coding N22 is established when urinary calculi are directly attributable to a pre-existing underlying medical condition.The calculi represent a complication or secondary effect of the primary disease.
The clinical responsibility for coding N22 rests with the physician or qualified healthcare professional accurately identifying and coding the underlying disease first, followed by N22 to indicate the presence of urinary calculi secondary to that condition.
In simple words: This code is for kidney stones or bladder stones that are caused by another medical problem.The doctor will use a different code to describe the main problem first, and then this code to indicate that there are also stones.
N22 in the ICD-10-CM coding system signifies calculus of the urinary tract, but it's crucial to remember that this code is used only when the urinary calculus is secondary to another, more significant underlying disease.The underlying condition should always be coded first. Examples of such underlying diseases include gout (M1A.-, M10.-), schistosomiasis (B65.0-B65.9), and other specified conditions.This code is not appropriate for cases where the urinary calculus is the primary diagnosis.
Example 1: A patient with gout (M10.1) presents with symptoms of kidney stones.The physician documents the presence of renal calculi secondary to hyperuricemia.The correct coding would be M10.1 followed by N22., A patient with a history of schistosomiasis (B65.1) develops bladder stones. The physician confirms the bladder calculi are a complication of the parasitic infection. The codes used should be B65.1 followed by N22., A patient with a known metabolic disorder causing hypercalcemia develops multiple urinary stones.The metabolic disorder code would be listed first, followed by N22 to indicate the secondary urinary calculi.
* Detailed documentation of the underlying disease.* Specific location of the urinary calculus (kidney, ureter, bladder).* Imaging studies confirming the presence of urinary calculi (e.g., KUB X-ray, CT scan).* Clinical findings and symptoms related to both the underlying condition and the urinary calculi.
** This code should be used cautiously and only when the urinary calculus is a direct consequence of another diagnosed condition.Incorrect use of N22 can lead to inaccurate reimbursement.
- Payment Status: Active
- Modifier TC rule: Not applicable to this ICD-10 code.
- Specialties:Urology, Nephrology, Internal Medicine
- Place of Service:Office, Hospital Inpatient, Hospital Outpatient, Emergency Room - Hospital