D84.822
Billable codeImmunodeficiency due to external causes
The ICD-10 code for immunodeficiency due to external causes is D84.822.
Clinical notes
Code also
Two codes may be needed to fully describe a condition, but unlike Code First/Use Additional Code, the sequencing order is not mandated by convention.
- , if applicable, radiological procedure and radiotherapy (Y84.2)
Use additional code
This code represents an underlying condition. When a related manifestation is also present, coding convention calls for an additional code to be listed after this one.
- code for external cause such as:
- exposure to ionizing radiation (W88)
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •If the associated manifestation or related condition noted above is also documented, an additional code should be reported alongside this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- D84.821Immunodeficiency due to drugs
- D84.822Immunodeficiency due to external causes
Associated MS-DRGs
D84.822 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.