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D89

Non-billable

Other disorders involving the immune mechanism, not elsewhere classified

D89 is the ICD-10-CM code for Other disorders involving the immune mechanism, not elsewhere classified. It is a non-billable category code — use a more specific child code such as D89.0 for billing.

Status
Header (non-billable)
Chapter
D50-D89
Subcodes
7
Edition
FY2026

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

Excludes1 — not coded here

  • •hyperglobulinemia NOS (R77.1)
  • •monoclonal gammopathy (of undetermined significance) (D47.2)

Excludes2 — not included here

  • •transplant failure and rejection (T86.-)

Frequently asked questions

What is ICD-10 code D89?
D89 is the ICD-10-CM code for "Other disorders involving the immune mechanism, not elsewhere classified". It falls under D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
Is D89 a billable code?
No — D89 is a non-billable header code. Use a more specific child code (such as D89.0) for billing.
What are the subcodes of D89?
D89 has 7 more specific child codes, including D89.0, D89.1, D89.2.
What is excluded from D89?
Excludes1 (not coded here): hyperglobulinemia NOS (R77.1); monoclonal gammopathy (of undetermined significance) (D47.2).

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

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