What N35 covers · when clinicians use it
ICD-10 code N35 identifies Urethral stricture in the U.S. ICD-10-CM clinical and billing record set. It sits within the Genitourinary System chapter (N00–N99), the section that groups related diagnoses so providers, payers, and public-health agencies report them consistently. Clinicians and medical coders apply N35 when an encounter's findings match the Urethral stricture description, attaching it to the patient record so downstream insurance claims, payer audits, quality reporting, and epidemiological surveillance all reference the same standardized diagnosis. The ICD-10-CM is maintained by the Centers for Medicare & Medicaid Services and the CDC's National Center for Health Statistics, with an updated official code set released each U.S. fiscal year — always verify N35 against the current CMS/CDC release and your payer's documentation guidance before final use. This page summarizes documentation context for N35 and is a coding reference, not clinical, diagnostic, or billing advice.
N35 refers to Urethral stricture, 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 Urethral stricture 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 N35 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
- N36 – Other disorders of urethra
- N37 – Urethral disorders in diseases classified elsewhere
- N39 – Other disorders of urinary system
FAQs
Q1: What is ICD10 code N35?
A: It refers to Urethral stricture, 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 N35 ensures accurate classification and management of Urethral stricture, helping healthcare providers deliver timely interventions and prevent complications like recurrent infections, renal damage, or severe urinary retention.