Immunodeficiency due to drugs

This code signifies a compromised immune system directly resulting from the administration of therapeutic drugs. This can manifest as a reduced ability to fight off infections or an impaired immune response due to medication side effects or immunosuppressive therapies.

Apply this code when documentation clearly links a patient's immunodeficiency to a specific drug or class of drugs. This is often seen in patients undergoing chemotherapy, organ transplant recipients on immunosuppressants, or individuals on long-term corticosteroids.

• Always identify the specific drug causing the immunodeficiency, if known, using an additional code from T36-T50.
• Do not use this code for congenital or primary immunodeficiencies; those have specific codes elsewhere.
• Ensure documentation explicitly states the drug as the cause of the immunodeficiency, not merely a co-occurring condition.