Other common variable immunodeficiencies

This code represents a heterogeneous group of primary immunodeficiencies characterized by impaired antibody production and recurrent infections, but which do not fit the criteria for other specified common variable immunodeficiency (CVID) subtypes. Patients typically present with hypogammaglobulinemia affecting at least two immunoglobulin classes (IgG, IgA, or IgM) and poor or absent antibody responses to vaccines.

Use this code for patients diagnosed with CVID who do not meet the diagnostic criteria for specific CVID subtypes, or when the specific subtype is not documented. This code is appropriate when the physician explicitly states "other common variable immunodeficiency" or when the clinical picture aligns with CVID but lacks further specification. Documentation should clearly indicate a diagnosis of CVID and rule out other primary or secondary causes of immunodeficiency.

• Ensure documentation specifies "other" CVID or lacks further subtyping to differentiate from more specific CVID codes.
• Do not use this code if a more specific CVID subtype (e.g., CVID with predominant B-cell abnormalities) is documented.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if managing complications related to the immunodeficiency.