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    v1.0.28
    OpenPayerBilling CodesOther diseases of the urinary systemICD-10-CM n30-cystitis
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    ICD-10-CM Code For Cystitis: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group N30 includes inflammatory conditions of the urinary bladder, such as acute cystitis, chronic cystitis, and other specified and unspecified cystitis subtypes that may include hematuria or pelvic pain. These ICD-10-CM diagnosis codes are used to document episodes of bladder inflammation and related symptoms, capturing disease acuity, complications, and involvement of the lower urinary tract. Accurate coding within the ICD-10-CM N30 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM N30: Cystitis Overview

    The ICD-10-CM N30 code group covers cystitis diagnoses, inflammatory conditions of the urinary bladder. These conditions target the lower urinary tract and can be acute, chronic, or associated with hematuria and other symptoms. Accurate coding matters for reimbursement because it links clinical documentation to claim processing and captures clinical complexity for quality reporting.

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    When to Use

    Use codes from this group when clinical documentation identifies bladder inflammation, whether acute, chronic, specified, or unspecified, and when symptoms or findings are localized to the bladder. Assign the most specific code that matches documented acuity, laterality if applicable, and associated findings such as hematuria.

    ICD-10-CM Codes

    14 rows

    ICD-10-CM CodeDescription
    N30.00Acute cystitis without hematuria
    N30.01Acute cystitis with hematuria
    N30.10Interstitial cystitis (chronic) without hematuria
    N30.11Interstitial cystitis (chronic) with hematuria
    N30.20Other chronic cystitis without hematuria
    N30.21Other chronic cystitis with hematuria
    N30.30Trigonitis without hematuria
    N30.31Trigonitis with hematuria
    N30.40Irradiation cystitis without hematuria
    N30.41Irradiation cystitis with hematuria
    N30.80Other cystitis without hematuria
    N30.81Other cystitis with hematuria
    N30.90Cystitis, unspecified without hematuria
    N30.91Cystitis, unspecified with hematuria

    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

    • A previously healthy adult woman presents to urgent care with sudden onset dysuria, urinary frequency, suprapubic pain, and low-grade fever for 48 hours. Urinalysis shows pyuria and positive nitrites consistent with a straightforward bacterial bladder infection; no flank pain or systemic signs are present, so an acute uncomplicated cystitis diagnosis from this group is assigned. Typical codes: N30.00, N30.01
    • An elderly man with a history of recurrent urinary tract infections and neurogenic bladder reports months of persistent lower urinary tract symptoms including urgency, frequency, and suprapubic discomfort despite intermittent antibiotic courses. Evaluation documents chronic inflammation of the bladder with episodes of exacerbation and sterile urine cultures at times, supporting a chronic or recurrent cystitis code from this group to capture ongoing disease management. Typical codes: N30.20, N30.21
    • A hospitalized patient with an indwelling urinary catheter develops new-onset fever, marked suprapubic tenderness, and purulent drainage from the catheter site; urine culture grows a multidrug-resistant organism. Because the bladder inflammation is associated with the catheter and may be specified as acute cystitis with indwelling device or unspecified acute cystitis requiring inpatient treatment, an acute cystitis code from this group that reflects the specified or unspecified acute presentation is assigned. Typical codes: N30.00, N30.01

    Related Codes

    N31-NEUROMUSCULAR-DYSFUNCTION-OF-BLADDER

    ICD-10-CM Code For Neuromuscular Dysfunction Of Bladder: Group Overview

    N32-OTHER-DISORDERS-OF-BLADDER

    ICD-10-CM Code For Other Disorders Of Bladder: Group Overview

    N33-BLADDER-DISORDERS-IN-DISEASES-CLASSIFIED-ELSEWHERE

    ICD-10-CM Code For Bladder Disorders In Diseases Classified Elsewhere: Group Overview

    N34-URETHRITIS-AND-URETHRAL-SYNDROME

    ICD-10-CM Code For Urethritis And Urethral Syndrome: Group Overview

    N35-URETHRAL-STRICTURE

    ICD-10-CM Code For Urethral Stricture: Group Overview

    N36-OTHER-DISORDERS-OF-URETHRA

    ICD-10-CM Code For Other Disorders Of Urethra: Group Overview

    N37-URETHRAL-DISORDERS-IN-DISEASES-CLASSIFIED-ELSEWHERE

    ICD-10-CM Code For Urethral Disorders In Diseases Classified Elsewhere: Group Overview

    N39-OTHER-DISORDERS-OF-URINARY-SYSTEM

    ICD-10-CM Code For Other Disorders Of Urinary System: 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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