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    v1.0.28
    OpenPayerBilling CodesMycosesICD-10-CM b44-aspergillosis
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    ICD-10-CM Code For Aspergillosis: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group B44 includes infections and disease manifestations caused by Aspergillus species, such as invasive aspergillosis, chronic pulmonary aspergillosis, and allergic bronchopulmonary aspergillosis. These ICD-10-CM diagnosis codes are used to document clinical scenarios that capture disease severity, organ involvement, and complications related to fungal infection. Accurate coding within the ICD-10-CM B44 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM B44: Aspergillosis Overview

    The ICD-10-CM B44 group represents infections caused by Aspergillus species, affecting the respiratory tract, sinuses, and potentially disseminating to other organs. These diagnoses target fungal disease processes ranging from allergic reactions to invasive and chronic pulmonary infections. Accurate coding ensures clinical severity and organ involvement are captured, which is important for correct reimbursement and clinical record integrity.

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    When to Use

    Use a code from this group when a clinical diagnosis of aspergillosis is documented, specifying the form and site of infection. Codes are selected to reflect severity, acute versus chronic presentation, and any documented complications.

    ICD-10-CM Codes

    7 rows

    ICD-10-CM CodeDescription
    B44.0Invasive pulmonary aspergillosis
    B44.1Other pulmonary aspergillosis
    B44.2Tonsillar aspergillosis
    B44.7Disseminated aspergillosis
    B44.81Allergic bronchopulmonary aspergillosis
    B44.89Other forms of aspergillosis
    B44.9Aspergillosis, unspecified

    DRG Codes

    11 rows

    DRG CodeDescription
    177Respiratory Infections and Inflammations with MCC
    178Respiratory Infections and Inflammations with CC
    179Respiratory Infections and Inflammations without CC/MCC
    196Interstitial Lung Disease with MCC
    197Interstitial Lung Disease with CC
    198Interstitial Lung Disease without CC/MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems
    867Other Infectious and Parasitic Diseases Diagnoses with MCC
    868Other Infectious and Parasitic Diseases Diagnoses with CC
    869Other Infectious and Parasitic Diseases Diagnoses without CC/MCC

    Typical Clinical Scenarios

    • An adult with acute febrile neutropenia following chemotherapy presents to the emergency department with pleuritic chest pain, hemoptysis, and rapidly progressive focal pulmonary infiltrates on chest CT suspicious for angioinvasive fungal infection; bronchoalveolar lavage yields septate hyphae consistent with Aspergillus and culture/PCR confirms Aspergillus species, prompting initiation of antifungal therapy. Typical codes: B44.0, B44.1.
    • A middle-aged patient with chronic sinus congestion and nasal obstruction refractory to antibiotics is evaluated in ENT clinic; endoscopic exam shows mucosal polypoid lesions with granulation tissue and biopsy demonstrates allergic fungal sinusitis with eosinophilic mucin containing fungal elements, indicating a noninvasive chronic sinonasal aspergillosis process. Typical codes: B44.7, B44.89.
    • A person with longstanding COPD and recurrent cavities on chest imaging develops a chronic cough, weight loss, and occasional hemoptysis; sputum and imaging suggest a fungal ball (aspergilloma) within a preexisting pulmonary cavity, representing a chronic saprophytic colonization complicating underlying lung disease. Typical codes: B44.2, B44.9.

    Related Codes

    B35-DERMATOPHYTOSIS

    ICD-10-CM Code For Dermatophytosis: Group Overview

    B36-OTHER-SUPERFICIAL-MYCOSES

    ICD-10-CM Code For Other Superficial Mycoses: Group Overview

    B37-CANDIDIASIS

    ICD-10-CM Code For Candidiasis: Group Overview

    B38-COCCIDIOIDOMYCOSIS

    ICD-10-CM Code For Coccidioidomycosis: Group Overview

    B39-HISTOPLASMOSIS

    ICD-10-CM Code For Histoplasmosis: Group Overview

    B41-PARACOCCIDIOIDOMYCOSIS

    ICD-10-CM Code For Paracoccidioidomycosis: Group Overview

    B42-SPOROTRICHOSIS-INFECTION

    ICD-10-CM Code For Sporotrichosis: Group Overview

    B43-CHROMOMYCOSIS-AND-PHEOMYCOTIC-ABSCESS

    ICD-10-CM Code For Chromomycosis And Pheomycotic Abscess: Group Overview

    B45-CRYPTOCOCCOSIS

    ICD-10-CM Code For Cryptococcosis: Group Overview

    B46-ZYGOMYCOSIS

    ICD-10-CM Code For Zygomycosis: Group Overview

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    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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