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    v1.0.28
    OpenPayerBilling CodesOther disorders of kidney and ureterICD-10-CM n28-other-disorders-of-kidney-and-ureter
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    ICD-10-CM Code For Other Disorders Of Kidney And Ureter: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group N28 includes various other and unspecified disorders of the kidney and ureter, covering conditions such as renal tubular disorders, renal sclerosis not elsewhere classified, and other specified localized kidney abnormalities. These ICD-10-CM diagnosis codes are used to document clinical encounters involving atypical, unspecified, or less common renal and ureteral conditions, capturing disease severity, organ involvement, or clinical complexity relevant to this group. Accurate coding within the ICD-10-CM N28 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM N28: Other Disorders Of Kidney And Ureter, Not Elsewhere Classified Overview

    The ICD-10-CM N28 group encompasses a range of uncommon or unspecified disorders affecting the kidneys and ureters that are not classified elsewhere in the coding system. These diagnoses target renal and urinary tract structure and function, including conditions such as tubular disorders, renal sclerosis not otherwise specified, and other specified kidney abnormalities. Accurate coding matters for correct claim processing, clinical continuity, and appropriate reimbursement because it reflects the specific renal pathology and clinical complexity.

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    When to Use

    Use a code from this group when the patient's diagnosis documents an other-specified or unspecified disorder of the kidney or ureter that is not covered by a more specific ICD-10-CM code. Select the most specific code available from the N28 series to reflect the documented clinical findings and to support accurate billing and medical recordkeeping.

    ICD-10-CM Codes

    10 rows

    ICD-10-CM CodeDescription
    N28.0Ischemia and infarction of kidney
    N28.1Cyst of kidney, acquired
    N28.81Hypertrophy of kidney
    N28.82Megaloureter
    N28.83Nephroptosis
    N28.84Pyelitis cystica
    N28.85Pyeloureteritis cystica
    N28.86Ureteritis cystica
    N28.89Other specified disorders of kidney and ureter
    N28.9Disorder of kidney and ureter, unspecified

    DRG Codes

    7 rows

    DRG CodeDescription
    689Kidney and Urinary Tract Infections with MCC
    690Kidney and Urinary Tract Infections 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

    Typical Clinical Scenarios

    • An adult presents to the emergency department with sudden onset flank pain, gross hematuria, and oliguria after a recent urinary tract infection; imaging shows a small obstructing ureteral stone with secondary hydronephrosis and impaired renal drainage. A diagnosis from this group is assigned to capture the acute obstructive disorder of the kidney/ureter contributing to azotemia and urinary stasis. Typical codes: N28.89, N28.0.
    • A middle-aged patient in nephrology clinic with a history of long‑standing diabetes and recurrent urinary tract infections is found on routine labs to have persistent proteinuria, declining estimated glomerular filtration rate, and imaging evidence of chronic pyelonephritic scarring. A code from this group is used to document the chronic structural/functional abnormalities of the kidney/ureter that are not classified elsewhere and that contribute to progressive CKD management. Typical codes: N28.1, N28.9.
    • A hospitalized patient with metastatic pelvic malignancy develops severe hydronephrosis due to external ureteral compression, with rising creatinine and need for ureteral stent placement. A diagnosis from this group is assigned to describe the obstructive disorder of the ureter/kidney as a complication of the cancer that necessitated urologic intervention. Typical codes: N28.84, N28.89.

    Related Codes

    N25-DISORDERS-RESULTING-FROM-IMPAIRED-RENAL-TUBULAR-FUNCTION

    ICD-10-CM Code For Disorders Resulting From Impaired Renal Tubular Function: Group Overview

    N26-UNSPECIFIED-CONTRACTED-KIDNEY

    ICD-10-CM Code For Unspecified Contracted Kidney: Group Overview

    N27-SMALL-KIDNEY-OF-UNKNOWN-CAUSE

    ICD-10-CM Code For Small Kidney Of Unknown Cause: Group Overview

    N29-OTHER-DISORDERS-OF-KIDNEY-AND-URETER

    ICD-10-CM Code For Other Disorders Of Kidney And Ureter 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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