D892026
Non-billable
Other disorders involving the immune mechanism, not elsewhere classified
D89 is a non-billable ICD-10-CM category (header) code for Other disorders involving the immune mechanism, not elsewhere classified; a more specific code below it is required for claims in the FY2026 code set.
Clinical Notes
Frequently Asked Questions
Code Hierarchy
D89
Other disorders involving the immune mechanism, not elsewhere classifiedPolyclonal hypergammaglobulinemia
Cryoglobulinemia
Hypergammaglobulinemia, unspecified
Immune reconstitution syndrome
Mast cell activation syndrome and related disorders
Other specified disorders involving the immune mechanism, not elsewhere classified
Disorder involving the immune mechanism, unspecified
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Related MS-DRGs
178,566 Medicare hospitalizations across 5 DRGs for codes in D89
Top DRGs associated with codes in this category:
Official Guidelines
Chapter 3: Blood and Immune Disorders
Official coding guidelines for D50-D89