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    v1.0.28
    OpenPayerBilling CodesRenal tubulo-interstitial diseasesICD-10-CM n13-obstructive-and-reflux-uropathy
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    ICD-10-CM Code For Obstructive And Reflux Uropathy: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group N13 includes diagnoses related to obstructive and reflux uropathy such as renal and ureteral obstruction, hydronephrosis, and vesicoureteral reflux leading to tubulo-interstitial kidney disease. These ICD-10-CM diagnosis codes are used to document clinical scenarios including acute or chronic urinary tract obstruction, secondary renal damage, and impairment of renal drainage that may require intervention. Accurate coding within the ICD-10-CM N13 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM N13: Obstructive And Reflux Uropathy Overview

    The diagnoses in this group represent obstructive and reflux-related disorders of the urinary tract that affect the kidneys and ureters. They target conditions such as ureteral obstruction, hydronephrosis, and vesicoureteral reflux leading to renal tubulo-interstitial injury. Accurate coding matters for proper clinical documentation and reimbursement because it captures the severity and anatomical site of obstruction and its impact on renal function.

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    When to Use

    Use a code from this group when a clinical diagnosis documents urinary tract obstruction or reflux with associated effects on the kidney, such as hydronephrosis, pyelonephritis secondary to obstruction, or chronic tubulo-interstitial damage. Select codes that reflect the specific site, laterality, and acuity or chronicity as documented in the medical record.

    ICD-10-CM Codes

    18 rows

    ICD-10-CM CodeDescription
    N13.0Hydronephrosis with ureteropelvic junction obstruction
    N13.1Hydronephrosis with ureteral stricture, not elsewhere classified
    N13.2Hydronephrosis with renal and ureteral calculous obstruction
    N13.30Unspecified hydronephrosis
    N13.39Other hydronephrosis
    N13.4Hydroureter
    N13.5Crossing vessel and stricture of ureter without hydronephrosis
    N13.6Pyonephrosis
    N13.70Vesicoureteral-reflux, unspecified
    N13.71Vesicoureteral-reflux without reflux nephropathy
    N13.721Vesicoureteral-reflux with reflux nephropathy without hydroureter, unilateral
    N13.722Vesicoureteral-reflux with reflux nephropathy without hydroureter, bilateral
    N13.729Vesicoureteral-reflux with reflux nephropathy without hydroureter, unspecified
    N13.731Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateral
    N13.732Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateral
    N13.739Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified
    N13.8Other obstructive and reflux uropathy
    N13.9Obstructive and reflux uropathy, unspecified

    DRG Codes

    9 rows

    DRG CodeDescription
    689Kidney and Urinary Tract Infections with MCC
    690Kidney and Urinary Tract Infections without MCC
    693Urinary Stones with MCC
    694Urinary Stones without MCC
    698Other Kidney and Urinary Tract Diagnoses with MCC
    699Other Kidney and Urinary Tract Diagnoses with CC
    700Other Kidney and Urinary Tract Diagnoses without CC/MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems

    Related Codes

    N10-ACUTE-PYELONEPHRITIS

    ICD-10-CM Code For Acute Pyelonephritis: Group Overview

    N11-CHRONIC-TUBULO-INTERSTITIAL-NEPHRITIS

    ICD-10-CM Code For Chronic Tubulo-Interstitial Nephritis: Group Overview

    N12-TUBULO-INTERSTITIAL-NEPHRITIS

    ICD-10-CM Code For Tubulo-Interstitial Nephritis Not Specified As Acute Or Chronic: Group Overview

    N14-DRUG-AND-HEAVY-METAL-INDUCED-TUBULO-INTERSTITIAL-CONDITIONS

    ICD-10-CM Code For Drug- And Heavy-Metal-Induced Tubulo-Interstitial And Tubular Conditions: Group Overview

    N15-OTHER-RENAL-TUBULO-INTERSTITIAL-DISEASES

    ICD-10-CM Code For Other Renal Tubulo Interstitial Diseases: Group Overview

    N16-RENAL-TUBULO-INTERSTITIAL-DISORDERS

    ICD-10-CM Code For Renal Tubulo-Interstitial Disorders In Diseases Classified Elsewhere: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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