D89.4

Non-Billable

Mast cell activation syndrome and related disorders

D89.4 should not be used for reimbursement purposes as there are multiple sub-diagnoses that fall under this code. Please refer to the sub-diagnoses below.

Related Diagnoses

  • D89.40Mast cell activation, unspecified
  • D89.41Monoclonal mast cell activation syndrome
  • D89.42Idiopathic mast cell activation syndrome
  • D89.43Secondary mast cell activation
  • D89.44Hereditary alpha tryptasemia
  • D89.49Other mast cell activation disorder
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