D81.31

✓ Billable

Severe combined immunodeficiency due to adenosine deaminase deficiency

Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)

Also Known As

ADA deficiency with SCIDAdenosine deaminase [ADA] deficiency with severe combined immunodeficiency

✅ No additional coding notes for D81.31

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Code Information

CodeD81.31

BillableYes

ParentD81.3

CategoryDiseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)

Excludes10 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)