D83.8

HCC Category Mapping

What This Code Means

A common variable immunodeficiency with characteristics that don't fit the standard categories of B-cell, T-cell, or autoimmune problems.

Coding Tips

• •Use this code when the patient has CVID but with atypical or mixed presentations
• •Document the specific immunological abnormalities found to justify use of this code over D83.9

Clinical Significance

Other common variable immunodeficiencies encompass atypical or mixed presentations of common variable immunodeficiency that do not fit the standard categorization by B-cell abnormalities, T-cell disorders, or autoantibody-mediated mechanisms. These variants may involve complex immunological phenotypes with features spanning multiple subcategories or newly recognized immunogenetic defects.

Documentation Requirements

• ✓Documentation must include comprehensive immunological testing results showing the specific abnormalities present, immunoglobulin levels confirming the common variable immunodeficiency diagnosis, and an explanation of why the presentation does not fit D83.0, D83.1, or D83.2 categories.
• ✓Include clinical manifestations, treatment response, and any genetic testing identifying novel defects.

Commonly Confused Codes