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    v1.0.28
    OpenPayerBilling CodesArthropod-borne viral fevers and viral hemorrhagic feversICD-10-CM a90-dengue-fever-classical-dengue
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    ICD-10-CM Code For Dengue Fever Classical Dengue: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group A90 includes acute dengue fever diagnoses due to dengue virus, covering classical febrile presentations without hemorrhagic complications. These ICD-10-CM diagnosis codes are used to document acute arboviral infection episodes, capturing clinical severity, systemic involvement, and any complications relevant to care. Accurate coding within the ICD-10-CM A90 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM A90: Dengue Fever [classical dengue] Overview

    The ICD-10-CM A90 group represents acute infections caused by dengue virus, typically presenting with fever, headache, myalgia, and rash affecting multiple body systems. These diagnoses target infectious disease and systemic viral illness classification. Accurate coding matters for appropriate clinical documentation and for correct claims processing and reimbursement associated with acute arboviral infections.

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    When to Use

    Use a code from this group when a patient has an acute dengue infection presenting with the typical febrile syndrome without documented hemorrhagic manifestations. Assign codes based on confirmed clinical or laboratory diagnosis and documented severity to reflect the encounter accurately.

    ICD-10-CM Codes

    1 rows

    ICD-10-CM CodeDescription
    A90Dengue fever [classical dengue]

    DRG Codes

    2 rows

    DRG CodeDescription
    865Viral Illness with MCC
    866Viral Illness without MCC

    Typical Clinical Scenarios

    • A young adult presents to the emergency department with high-grade fever, severe retro-orbital headache, myalgias, arthralgias, nausea, and a diffuse maculopapular rash after travel to a dengue-endemic region. Laboratory testing shows leukopenia and thrombocytopenia without evidence of plasma leakage or hemorrhagic manifestations, prompting an acute outpatient or short-stay diagnosis of classical dengue. Typical codes: A90.
    • A pediatric patient is brought to urgent care with abrupt onset fever, persistent vomiting, abdominal pain, and signs of dehydration after several days of febrile illness; clinicians document suspicion for dengue based on epidemiology and order serology and NS1 antigen testing. Because the presentation is consistent with uncomplicated dengue fever requiring symptomatic management and hydration, the encounter is coded to reflect classical dengue. Typical codes: A90.
    • An adult with known recent dengue infection returns for follow-up with ongoing fatigue, intermittent low-grade fever, and documented convalescent phase thrombocytopenia but no hemorrhagic complications; the visit documents recovery from acute dengue and monitoring of blood counts and clinical improvement. The visit is coded to indicate the patient’s recent classical dengue infection and related convalescent status. Typical codes: A90.

    Related Codes

    A91-DENGUE-HEMORRHAGIC-FEVER

    ICD-10-CM Code For Dengue Hemorrhagic Fever: Group Overview

    A92-OTHER-MOSQUITO-BORNE-VIRAL-FEVERS

    ICD-10-CM Code For Other Mosquito Borne Viral Fevers: Group Overview

    A93-OTHER-ARTHROPOD-BORNE-VIRAL-FEVERS

    ICD-10-CM Code For Other Arthropod Borne Viral Fevers Not Elsewhere Classified: Group Overview

    A94-UNSPECIFIED-ARTHROPOD-BORNE-VIRAL-FEVER

    ICD-10-CM Code For Unspecified Arthropod-Borne Viral Fever: Group Overview

    A95-YELLOW-FEVER

    ICD-10-CM Code For Yellow Fever: Group Overview

    A96-ARENAVIRAL-HEMORRHAGIC-FEVER

    ICD-10-CM Code for Arenaviral Hemorrhagic Fever: Group Overview

    A98-OTHER-VIRAL-HEMORRHAGIC-FEVERS

    ICD-10-CM Code For Other Viral Hemorrhagic Fevers Not Elsewhere Classified: Group Overview

    A99-UNSPECIFIED-VIRAL-HEMORRHAGIC-FEVER

    ICD-10-CM Code For Unspecified Viral Hemorrhagic Fever: 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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