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D84.81

✓ Billable

Immunodeficiency due to conditions classified elsewhere

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

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📋 Code Instructions

  • • Code first: underlying condition, such as:
  • • Code first: chromosomal abnormalities (Q90-Q99)
  • • Code first: diabetes mellitus (E08-E13)
  • • Code first: malignant neoplasms (C00-C96)

❌ Excludes1

direct

Cannot be coded with D84.81

  • • certain disorders involving the immune mechanism (D80-D83, D84.0, D84.1, D84.9)
  • • human immunodeficiency virus [HIV] disease (B20)

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Code Information

CodeD84.81
BillableYes
ParentD84.8
CategoryDiseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
Excludes12 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)