D84.81

Billable

Immunodeficiency due to conditions classified elsewhere

D84.81 is the ICD-10-CM code for Immunodeficiency due to conditions classified elsewhere. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
D50-D89
Parent
D84.8
Edition
FY2026

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

Excludes1 — not coded here

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

Code first

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

Frequently asked questions

What is ICD-10 code D84.81?
D84.81 is the ICD-10-CM code for "Immunodeficiency due to conditions classified elsewhere". It falls under D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
Is D84.81 a billable code?
Yes — D84.81 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from D84.81?
Excludes1 (not coded here): certain disorders involving the immune mechanism (D80-D83, D84.0, D84.1, D84.9); human immunodeficiency virus [HIV] disease (B20).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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