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    v1.0.28
    OpenPayerBilling CodesUrolithiasisICD-10-CM n22-calculus-of-urinary-tract
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    ICD-10-CM Code For Calculus Of Urinary Tract In Diseases Classified Elsewhere: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group N22 includes diagnoses for urinary tract calculi that occur as a manifestation of another disease classified elsewhere, such as metabolic disorders or anatomical abnormalities leading to stone formation. These ICD-10-CM diagnosis codes are used to document clinical situations where stone disease is linked to a primary disease, capturing disease relationship, anatomical site, and complexity of care. Accurate coding within the ICD-10-CM N22 group supports proper claim adjudication and complete clinical documentation.

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    ICD-10-CM N22: Calculus Of Urinary Tract In Diseases Classified Elsewhere Overview

    This code group represents urinary tract stones that occur in the context of another underlying disease classified elsewhere, affecting the urinary system and often reflecting a secondary cause. Accurate assignment identifies both the calculi and the associated condition, supporting clinical clarity and reimbursement. Precise coding is important for complete documentation and correct claim processing.

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    When to Use

    Use a code from this group when documentation indicates that urinary tract stones are a manifestation of, or directly related to, another disease that is coded separately. Assign these codes to capture the relationship between the calculi and the underlying condition to support accurate clinical records and claims.

    ICD-10-CM Codes

    1 rows

    ICD-10-CM CodeDescription
    N22Calculus of urinary tract in diseases classified elsewhere

    DRG Codes

    2 rows

    DRG CodeDescription
    693Urinary Stones with MCC
    694Urinary Stones without MCC

    Typical Clinical Scenarios

    • A middle-aged patient with a history of primary hyperparathyroidism presents to the outpatient nephrology clinic for evaluation of recurrent flank pain and microscopic hematuria. Imaging studies (noncontrast CT) reveal renal calculi that are suspected to result from the underlying endocrine disorder, and the visit documents management of stones in the setting of the known systemic disease; a code from this group is assigned to indicate calculus of the urinary tract in disease classified elsewhere. Typical codes: N22
    • An elderly hospitalized patient with chronic urinary tract infection secondary to neurogenic bladder due to multiple sclerosis develops acute worsening of renal colic and is found to have ureteral stones on imaging causing obstructive uropathy; the inpatient record links the urinary calculi to the underlying neurologic condition, prompting assignment of a code from this group to capture the calculus in disease classified elsewhere. Typical codes: N22
    • A pediatric patient with cystic fibrosis is seen in a specialty clinic for evaluation of recurrent kidney stones contributing to hematuria and intermittent obstruction; documentation specifies the stones are related to metabolic abnormalities of the primary disease, and a code from this group is used to indicate calculus of the urinary tract occurring in the setting of another classified disease. Typical codes: N22

    Related Codes

    N20-CALCULUS-OF-KIDNEY-AND-URETER

    ICD-10-CM Code For Calculus Of Kidney And Ureter: Group Overview

    N21-CALCULUS-OF-LOWER-URINARY-TRACT

    ICD-10-CM Code For Calculus Of Lower Urinary Tract: Group Overview

    N23-UNSPECIFIED-RENAL-COLIC

    ICD-10-CM Code For Unspecified Renal Colic: 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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