D89
⚠ Non-billable
Other disorders involving the immune mechanism, not elsewhere classified
ICD-10-CM · FY2026 · Diseases of the Blood and Blood-Forming Organs
Code
D89
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Blood and Blood-Forming Organs
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- hyperglobulinemia NOS (R77.1)
- monoclonal gammopathy (of undetermined significance) (D47.2)
Excludes2 — not included here, but may code together
- transplant failure and rejection (T86.-)
Frequently asked questions
What is ICD-10 code D89?
ICD-10-CM code D89 represents Other disorders involving the immune mechanism, not elsewhere classified. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Blood and Blood-Forming Organs chapter, effective October 1, 2025 – September 30, 2026.
Is D89 billable?
No. D89 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is D89 in?
D89 belongs to the Diseases of the Blood and Blood-Forming Organs chapter (D50–D89) of ICD-10-CM.
Related codes in the D89 category
D89.0
Polyclonal hypergammaglobulinemia
Billable
D89.1
Cryoglobulinemia
Billable
D89.2
Hypergammaglobulinemia, unspecified
Billable
D89.3
Immune reconstitution syndrome
Billable
D89.4
Mast cell activation syndrome and related disorders
Non-billable
D89.8
Other specified disorders involving the immune mechanism, not elsewhere classified
Non-billable
D89.9
Disorder involving the immune mechanism, unspecified
Billable
D89.40
Mast cell activation, unspecified
Billable
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