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D89.4-D89.49

Mast cell activation syndrome and related disorders

This page shows all ICD-10-CM codes in the range from D89.4 to D89.49 in Chapter 2: Neoplasms.

Codes are organized hierarchically by chapter and three-character category codes (e.g., D89). Each category can be expanded to show more specific subcategory and subclassification codes. Click on the code buttons to expand and see child codes.

Parent Code

All codes in this range are subcategories of:

D89.4Mast cell activation syndrome and related disorders

Codes in this Range (7+)

Chapter 2: Neoplasms

Range: C00-D49

D89Other disorders involving the immune mechanism, not elsewhere classified
D89.4Mast cell activation syndrome and related disorders
─D89.40Mast cell activation, unspecified
Billable
─D89.41Monoclonal mast cell activation syndrome
Billable
─D89.42Idiopathic mast cell activation syndrome
Billable
─D89.43Secondary mast cell activation
Billable
─D89.44Hereditary alpha tryptasemia
Billable
─D89.49Other mast cell activation disorder
Billable
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