N13
Non-Billable

Obstructive and reflux uropathy

Non-Billable / Non-Specific Code

What is Obstructive and reflux uropathy?

ICD-10-CM N13 is the diagnosis code for Obstructive and reflux uropathy. This code falls under the section "Renal tubulo-interstitial diseases" within Chapter 14 — Diseases of the genitourinary system (N00-N99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.

â„šī¸ Excludes2

Coding Guidelines for N13

â„šī¸ Type 2 Excludes (Code separately if applicable)

The following conditions are not included in N13. If the patient has both, code each condition separately:

  • calculus of kidney and ureter without hydronephrosis (N20.-)
  • congenital obstructive defects of renal pelvis and ureter (Q62.0-Q62.3)
  • hydronephrosis with ureteropelvic junction obstruction (Q62.11)
  • obstructive pyelonephritis (N11.1)

ICD-10-CM Code Hierarchy

Understanding where N13 sits in the ICD-10-CM classification helps ensure proper coding:

Sub-Codes 10 entries
N13.0Hydronephrosis with ureteropelvic junction obstructionBillableN13.1Hydronephrosis with ureteral stricture, not elsewhere classifiedBillableN13.2Hydronephrosis with renal and ureteral calculous obstructionBillableN13.3Other and unspecified hydronephrosisNon-BillableN13.30Unspecified hydronephrosisBillableN13.39Other hydronephrosisBillableN13.4HydroureterBillableN13.5Crossing vessel and stricture of ureter without hydronephrosisBillableN13.6PyonephrosisBillableN13.7Vesicoureteral-refluxNon-BillableN13.70Vesicoureteral-reflux, unspecifiedBillableN13.71Vesicoureteral-reflux without reflux nephropathyBillableN13.72Vesicoureteral-reflux with reflux nephropathy without hydroureterNon-BillableN13.721Vesicoureteral-reflux with reflux nephropathy without hydroureter, unilateralBillableN13.722Vesicoureteral-reflux with reflux nephropathy without hydroureter, bilateralBillableN13.729Vesicoureteral-reflux with reflux nephropathy without hydroureter, unspecifiedBillableN13.73Vesicoureteral-reflux with reflux nephropathy with hydroureterNon-BillableN13.731Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateralBillableN13.732Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateralBillableN13.739Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecifiedBillableN13.8Other obstructive and reflux uropathyBillableN13.9Obstructive and reflux uropathy, unspecifiedBillable
Related Codes

Frequently Asked Questions

Is N13 a billable ICD-10-CM code?

No, N13 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.

What does N13 mean?

N13 is the ICD-10-CM diagnosis code for "Obstructive and reflux uropathy". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.

What section is N13 in?

N13 is located in Section N10-N16 — "Renal tubulo-interstitial diseases" within Chapter 14 of the ICD-10-CM Tabular List.

What are the sub-codes of N13?

N13 has 10 sub-code(s) that provide more specific detail: N13.0, N13.1, N13.2, N13.3, N13.4 and more.

When should I use N13?

Use N13 when the patients documented diagnosis matches "Obstructive and reflux uropathy" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.

People Also Ask

What is the ICD-10 code for Obstructive and reflux uropathy?

The ICD-10-CM code for Obstructive and reflux uropathy is N13.

Can N13 be used for primary diagnosis?

No, N13 is non-billable. Use a more specific sub-code for primary diagnosis billing.

What chapter is N13 in?

N13 is in Chapter 14 of the ICD-10-CM Tabular List.

Is N13 valid for 2026?

Yes, N13 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.

See Also

← PreviousN12Tubulo-interstitial nephritis, not specified as acute or chronicNext →N13.0Hydronephrosis with ureteropelvic junction obstruction
Code Details
N13
Obstructive and reflux uropathy
Non-Billable / Non-Specific Code
14 — Diseases of the genitourinary system (N00-N99)
N10-N16 — Renal tubulo-interstitial diseases
2026 ICD-10-CM