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ICD-10 Coding for Hydroureteronephrosis(N13.32, N13.6)

Complete ICD-10-CM coding and documentation guide for Hydroureteronephrosis. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Obstructive uropathyUreteral obstruction with hydronephrosis

Related ICD-10 Code Ranges

Complete code families applicable to Hydroureteronephrosis

N13.0-N13.9Primary Range

Obstructive and reflux uropathy

This range includes codes for various types of obstructive uropathy, including hydroureteronephrosis.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
N13.32Calculus obstruction of ureterUse when a ureteral stone causes obstruction and hydronephrosis is present.
  • CT showing stone
  • Ultrasound showing hydronephrosis
N13.6PyonephrosisUse when infection is present with hydronephrosis.
  • Positive urine culture
  • Fever and leukocytosis

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for hydroureteronephrosis

Essential facts and insights about Hydroureteronephrosis

The ICD-10 code for hydroureteronephrosis due to a ureteral stone is N13.32. If infection is present, use N13.6.

Primary ICD-10-CM Codes for hydroureteronephrosis

Calculus obstruction of ureter
Non-billable Code

Decision Criteria

clinical Criteria

  • Presence of ureteral stone and hydronephrosis

Applicable To

  • Ureteral stone causing obstruction

Excludes

  • N20.0 (Calculus of kidney)

Clinical Validation Requirements

  • CT showing stone
  • Ultrasound showing hydronephrosis

Code-Specific Risks

  • Incorrectly coding without hydronephrosis documentation

Coding Notes

  • Ensure hydronephrosis is documented; do not use with N20.0.

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Unspecified Escherichia coli [E. coli] as the cause of diseases classified elsewhere

B96.20
Use when E. coli is identified as the infectious agent in pyonephrosis.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Pyonephrosis

N13.6
Use N13.6 when infection is present alongside obstruction.

Calculus obstruction of ureter

N13.32
Use N13.32 when no infection is present.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Hydroureteronephrosis to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code N13.32.

Impact

Clinical: Impacts treatment decisions., Regulatory: Non-compliance with coding standards., Financial: Potential claim denials.

Mitigation Strategy

Always document right, left, or bilateral involvement.

Impact

Reimbursement: Incorrect coding can lead to claim denials., Compliance: Violates ICD-10 Excludes1 note., Data Quality: Leads to inaccurate clinical data.

Mitigation Strategy

Use N13.2 alone when hydronephrosis is due to a stone.

Impact

Using unspecified codes like N13.30 can trigger audits.

Mitigation Strategy

Ensure detailed documentation to support specific coding.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Hydroureteronephrosis, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Hydroureteronephrosis

Use these documentation templates to ensure complete and accurate documentation for Hydroureteronephrosis. These templates include all required elements for proper coding and billing.

Urology Consultation

Specialty: Urology

Required Elements

  • Imaging findings
  • Infection status
  • Stone size and location

Examples: Poor vs. Good Documentation

Poor Documentation Example
Right kidney stone with swelling.
Good Documentation Example
CT reveals 7mm obstructing right proximal ureteral calculus with associated right hydroureteronephrosis (APRPD 18mm).
Explanation
The good example provides specific imaging findings and measurements.

Need help with ICD-10 coding for Hydroureteronephrosis? Ask your questions below.

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