ICD-10 Code D80.2 – Selective deficiency of immunoglobulin A [IgA] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D80.2 – Selective deficiency of immunoglobulin A [IgA]
What it is
D80.2 identifies selective IgA deficiency, an immune disorder where the body makes little or no immunoglobulin A. It is used when the deficiency is primary and not explained by another condition.
Clinical signs
Clinical features vary; refer to documentation. Patients may have recurrent sinopulmonary infections, gastrointestinal infections, allergies, or be asymptomatic with an incidental lab finding.
When to use this code
Use D80.2 when the clinician documents selective IgA deficiency or selective deficiency of immunoglobulin A. It fits confirmed primary IgA deficiency, including cases found during immune workup or evaluation for recurrent infections. Check documentation if the record only notes low immunoglobulins without specifying IgA.
Do not use for
Do not use this code for general hypogammaglobulinemia, combined immunodeficiency, or transient low IgA without a confirmed diagnosis. Check documentation if the deficiency is secondary to another disease or medication.
Coding tip
Code only when the record clearly names selective IgA deficiency; otherwise, query for specificity.