ICD-10-CM · Chapter 3 · D50–D89
D89.44
Hereditary alpha tryptasemia
Diseases of the blood and immune mechanism
Quick facts
- Code
- D89.44
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 3 — Diseases of the blood and immune mechanism
- Category
- D89 — Other disorders involving the immune mechanism, not elsewhere classified
- Specificity
- 5 characters
How coders use this code
ICD-10-CM D89.44 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of hereditary alpha tryptasemia. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in D89
- D89Other disorders involving the immune mechanism, not elsewhere classified
- D89.0Polyclonal hypergammaglobulinemia
- D89.1Cryoglobulinemia
- D89.2Hypergammaglobulinemia, unspecified
- D89.3Immune reconstitution syndrome
- D89.4Mast cell activation syndrome and related disorders
- D89.40Mast cell activation, unspecified
- D89.41Monoclonal mast cell activation syndrome
- D89.42Idiopathic mast cell activation syndrome
- D89.43Secondary mast cell activation
- D89.49Other mast cell activation disorder
- D89.8Other specified disorders involving the immune mechanism, not elsewhere classified
- D89.81Graft-versus-host disease
- D89.810Acute graft-versus-host disease
- D89.811Chronic graft-versus-host disease
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