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    OpenPayerBilling CodesUrticaria and erythemaICD-10-CM l50-urticaria
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    ICD-10-CM Code For Urticaria: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group L50 includes diagnoses for urticaria, covering acute and chronic hives, physical urticarias, and angioedema associated with wheals. These ICD-10-CM diagnosis codes are used to document clinical scenarios such as acute allergic reactions, recurrent chronic spontaneous urticaria, or urticaria associated with identifiable triggers, capturing disease severity and episode characteristics. Accurate coding within the ICD-10-CM L50 group supports proper claim adjudication and appropriate reimbursement.

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    ICD-10-CM L50: Urticaria Overview

    The ICD-10-CM L50 group represents urticaria, a dermal hypersensitivity reaction characterized by transient pruritic wheals and angioedema affecting the skin and subcutaneous tissues. These diagnoses target the integumentary system and reflect allergic, idiopathic, or physical triggers that cause hives. Accurate coding matters for correct claim processing and to reflect severity and episode characteristics that impact care and reimbursement.

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    When to Use

    Use a code from this group when the patient presents with documented wheals, hives, or angioedema attributable to urticaria and when the clinical notes specify acute versus chronic or a known trigger. Select specific codes when there is documentation of physical triggers, medication-associated urticaria, or recurrent spontaneous episodes to reflect severity and clinical complexity.

    ICD-10-CM Codes

    9 rows

    ICD-10-CM CodeDescription
    L50.0Allergic urticaria
    L50.1Idiopathic urticaria
    L50.2Urticaria due to cold and heat
    L50.3Dermatographic urticaria
    L50.4Vibratory urticaria
    L50.5Cholinergic urticaria
    L50.6Contact urticaria
    L50.8Other urticaria
    L50.9Urticaria, unspecified

    DRG Codes

    4 rows

    DRG CodeDescription
    606Minor Skin Disorders with MCC
    607Minor Skin Disorders without MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems

    Typical Clinical Scenarios

    • A young adult presents to urgent care with sudden onset of widespread, intensely pruritic wheals that appeared within hours after starting a new antibiotic. The clinician documents transient raised erythematous plaques that blanch and migrate over the trunk and limbs, consistent with acute urticaria triggered by a medication exposure; this is managed as an acute allergic reaction. Typical codes: L50.0, L50.1.
    • A middle-aged patient reports recurrent episodes of itchy hives occurring several times per week for more than six weeks without an identifiable external trigger; symptoms wax and wane and impact sleep. The evaluation focuses on chronicity and possible autoimmune or idiopathic causes, so a chronic spontaneous urticaria diagnosis from this group is used to capture the ongoing condition and guide longitudinal management. Typical codes: L50.2, L50.9.
    • An emergency department patient arrives with diffuse urticarial rash accompanied by angioedema of the lips and periorbital tissues after insect stings, causing airway concern and need for observation and systemic treatment. Because the urticaria is associated with angioedema and systemic involvement from a known external trigger, the encounter is coded to reflect urticaria with accompanying angioedema or allergic reaction manifestations. Typical codes: L50.3, L50.4.

    Related Codes

    L49-EXFOLIATION-DUE-TO-ERYTHEMATOUS-CONDITIONS

    ICD-10-CM Code For Exfoliation Due To Erythematous Conditions: Group Overview

    L51-ERYTHEMA-MULTIFORME

    ICD-10-CM Code For Erythema Multiforme: Group Overview

    L52-ERYTHEMA-NODOSUM

    ICD-10-CM Code For Erythema Nodosum: Group Overview

    L53-OTHER-ERYTHEMATOUS-CONDITIONS

    ICD-10-CM Code For Other Erythematous Conditions: Group Overview

    L54-ERYTHEMA-IN-DISEASES-CLASSIFIED-ELSEWHERE

    ICD-10-CM Code For Erythema 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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