N39: ICD10 Code for Other disorders of urinary system
N39 is the ICD10 code used for documenting Other disorders of urinary system in urology, nephrology, internal medicine, and emergency care.

N39 refers to Other disorders of urinary system, covering a range of bladder and urethral disorders from infections like cystitis and urethritis to structural issues like strictures and neuromuscular dysfunctions impacting urinary control and function.
Symptoms
- Dysuria (painful urination) – Common in cystitis (N30) and urethritis (N34)
- Urinary frequency and urgency – Seen in neuromuscular bladder dysfunction (N31)
- Hematuria (blood in urine) – Can occur across multiple bladder/urethral disorders
- Urinary retention or incomplete emptying – Especially with strictures (N35)
- Incontinence or dribbling – Linked to bladder dysfunction or urethral issues
Diagnosis
Diagnosis of Other disorders of urinary system typically involves urinalysis, urine cultures, bladder scans, cystoscopy, urodynamic studies, and imaging (ultrasound or CT urography) to evaluate structural or functional abnormalities.
ICD10 Code Usage
ICD10 code N39 is critical for documentation by urologists, nephrologists, internists, emergency medicine specialists, and primary care physicians when diagnosing, treating, and managing urinary tract infections, bladder dysfunctions, or urethral pathologies.
Related Codes
- N30 – Cystitis
- N31 – Neuromuscular dysfunction of bladder, not elsewhere classified
- N32 – Other disorders of bladder
- N33 – Bladder disorders in diseases classified elsewhere
- N34 – Urethritis and urethral syndrome
- N35 – Urethral stricture
- N36 – Other disorders of urethra
- N37 – Urethral disorders in diseases classified elsewhere
FAQs
Q1: What is ICD10 code N39?
A: It refers to Other disorders of urinary system, documenting disorders affecting the bladder, urethra, or broader urinary system resulting in infections, dysfunctions, or anatomical abnormalities.
Q2: What causes cystitis (N30)?
A: Typically bacterial infections (e.g., E. coli), but can also result from radiation, medications, or chemical irritants.
Q3: What is neuromuscular bladder dysfunction (N31)?
A: Loss of normal bladder control due to neurological conditions like spinal cord injury, multiple sclerosis, or diabetic neuropathy.
Q4: What leads to urethral strictures (N35)?
A: Strictures often result from infections, trauma, surgery, or catheterization causing urethral narrowing.
Q5: How are these conditions treated?
A: Treatments vary but may include antibiotics, bladder training, catheterization, surgery (e.g., urethral dilation or reconstruction), and medications to manage bladder spasms or overactivity.
Conclusion
ICD10 code N39 ensures accurate classification and management of Other disorders of urinary system, helping healthcare providers deliver timely interventions and prevent complications like recurrent infections, renal damage, or severe urinary retention.

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