D84: Other immunodeficiencies
Codes under D84 (Other immunodeficiencies). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| D84.0 | Lymphocyte function antigen-1 [LFA-1] defect | ✓ |
| D84.0 | Lymphocyte function antigen-1 [LFA-1] defect | ✓ |
| D84.1 | Defects in the complement system | ✓ |
| D84.1 | Defects in the complement system | ✓ |
| D84.8 | Other specified immunodeficiencies | — |
| D84.8 | Other specified immunodeficiencies | — |
| D84.9 | Immunodeficiency, unspecified | ✓ |
| D84.9 | Immunodeficiency, unspecified | ✓ |
| D84.81 | Immunodeficiency due to conditions classified elsewhere | ✓ |
| D84.81 | Immunodeficiency due to conditions classified elsewhere | ✓ |
| D84.82 | Immunodeficiency due to drugs and external causes | — |
| D84.82 | Immunodeficiency due to drugs and external causes | — |
| D84.89 | Other immunodeficiencies | ✓ |
| D84.89 | Other immunodeficiencies | ✓ |
| D84.821 | Immunodeficiency due to drugs | ✓ |
| D84.821 | Immunodeficiency due to drugs | ✓ |
| D84.822 | Immunodeficiency due to external causes | ✓ |
| D84.822 | Immunodeficiency due to external causes | ✓ |
Frequently asked questions
What is ICD-10-CM code D84?
D84 is an ICD-10-CM category covering Other immunodeficiencies. It contains 18 more specific diagnosis codes, 14 of which are billable.
Is D84 a billable code?
No — D84 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example D84.0 — Lymphocyte function antigen-1 [LFA-1] defect). 14 of the 18 codes under D84 are billable.
What codes fall under D84?
D84 includes D84.0, D84.0, D84.1, D84.1, D84.8, plus 13 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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