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ICD-10-CM · N13.39GeneralSystemic

Hydroureteronephrosis

Find comprehensive information on hydroureteronephrosis diagnosis, including clinical documentation, medical coding (ICD-10, SNOMED CT), treatment, and prognosis. Learn about the causes, symptoms, and management of hydronephrosis and ureteral obstruction. Explore resources for healthcare professionals related to renal ultrasound, diagnostic imaging, and patient care guidelines for hydroureteronephrosis. This resource offers insights into accurate coding and documentation practices for this complex urological condition.

Also known as
Obstructive uropathyUreteral obstruction with hydronephrosis
Definition

Swelling of the kidney and ureter due to urine buildup.

Clinical signs

Flank pain, abdominal distension, nausea, urinary changes, infection.

Common settings

Kidney stones, pregnancy, tumors, anatomical abnormalities, strictures.

Related Codes

ICD-10 Code Families

Complete code families applicable to N13.39

N13.4
Hydroureteronephrosis
N13.-
Ureteric obstruction NOS
N05.-
Unspecified nephritic syndrome
R32
Unspecified urinary incontinence
Code Comparison

When to use each related code

DescriptionWhen to use
Swelling of kidney & ureterUse for dilation/swelling of both kidney and ureter due to urine backup. Exclude obstruction if known.
Ureteral obstructionBlockage in the ureter. Code the underlying cause, e.g., stone, tumor. Use with imaging confirmation.
Kidney stonesMineral deposits in kidney. Specify type if known (calcium, uric acid, etc.). Document size & location.
Documentation

Best-practice checklist

  • Hydroureteronephrosis diagnosis: laterality (unilateral/bilateral)
  • Hydroureteronephrosis: document cause/etiology (e.g., obstruction, reflux)
  • Hydroureteronephrosis: severity (mild, moderate, severe) documented
  • Hydroureteronephrosis: imaging findings (ultrasound, CT) details
  • Hydroureteronephrosis: associated symptoms (pain, infection) if present
Coding & Audit Risks

Common pitfalls to avoid

Laterality Coding

Missing or incorrect laterality (right, left, bilateral) for hydroureteronephrosis can lead to inaccurate coding and claims.

Obstruction Specificity

Failure to document the specific cause of obstruction (e.g., calculus, stricture) impacts code selection and reimbursement.

Congenital vs. Acquired

Distinguishing between congenital and acquired hydronephrosis is crucial for accurate coding and affects severity and treatment.

Mitigation

Best-practice tips

  • 01Accurate ICD-10 coding (N13.x) for hydroureteronephrosis improves reimbursement.
  • 02Document laterality, severity, and etiology for complete hydroureteronephrosis CDI.
  • 03Timely follow-up imaging & urinalysis ensure compliant hydroureteronephrosis management.
  • 04Review medical necessity criteria for procedures related to hydroureteronephrosis diagnosis.
  • 05Standardized terminology for hydroureteronephrosis promotes clear communication & data analysis.
Clinical Decision Support

Step-by-step checklist

  1. 1

    Verify hydronephrosis laterality: unilateral or bilateral

  2. 2

    Confirm ureteral dilation presence and extent via imaging

  3. 3

    Assess renal function (eGFR, creatinine) for impairment

  4. 4

    Document obstruction level and cause if identifiable

Documentation Template

Ready-to-paste narrative

Patient presents with [chief complaint related to hydroureteronephrosis, e.g., flank pain, abdominal pain, urinary tract infection, hematuria].  Review of systems reveals [positive findings, e.g., dysuria, frequency, urgency, nausea, vomiting].  Past medical history includes [relevant comorbidities, e.g., kidney stones, urinary tract obstruction, congenital anomalies, diabetes, hypertension].  Physical examination reveals [relevant findings, e.g., costovertebral angle tenderness, palpable abdominal mass].  Hydronephrosis and hydroureter are suspected based on clinical presentation.  Diagnostic imaging, including [imaging modalities, e.g., ultrasound, CT urogram, MRI], was performed to evaluate the degree of hydroureteronephrosis and identify the underlying cause.  Imaging reveals [specific findings, e.g., dilated renal pelvis and calyces, dilated ureter, presence of obstructing stone, stricture, or mass].  Differential diagnoses include [alternative diagnoses, e.g., pyelonephritis, renal cyst, other causes of urinary tract obstruction].  Assessment:  Hydroureteronephrosis, [laterality, e.g., right, left, bilateral], likely secondary to [etiology, e.g., ureteral calculus, ureteropelvic junction obstruction, vesicoureteral reflux].  Plan:  [Treatment plan, e.g., pain management with analgesics, antibiotic therapy for infection, consultation with urology for further management, consideration for ureteral stent placement, nephrostomy tube placement, or surgical intervention depending on the underlying cause and severity].  Patient education provided regarding hydronephrosis, hydroureter, urinary tract obstruction, and potential complications.  Follow-up scheduled for [timeframe] to reassess symptoms and monitor the resolution of hydroureteronephrosis.  ICD-10 code [appropriate code, e.g., N13.30, N13.31, N13.32] and CPT codes [relevant procedural codes] will be used for billing and coding purposes.

Clinical accuracy: This information is provided for documentation and coding guidance and should not replace professional medical judgment.

Coding standard: ICD-10-CM, current FY guidelines.