• Activation

    • mast cell (disorder) (syndrome) D89.40
      ICD-10-CM Diagnosis Code D89.40

      Mast cell activation, unspecified

        2017 - New Code 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Mast cell activation disorder, unspecified
      • Mast cell activation syndrome, NOS
      • idiopathic D89.42
        ICD-10-CM Diagnosis Code D89.42

        Idiopathic mast cell activation syndrome

          2017 - New Code 2018 2019 2020 Billable/Specific Code
      • monoclonal D89.41
        ICD-10-CM Diagnosis Code D89.41

        Monoclonal mast cell activation syndrome

          2017 - New Code 2018 2019 2020 Billable/Specific Code
      • secondary D89.43
        ICD-10-CM Diagnosis Code D89.43

        Secondary mast cell activation

          2017 - New Code 2018 2019 2020 Billable/Specific Code
        Applicable To
        • Secondary mast cell activation syndrome
        Code Also
        • underlying etiology, if known
      • specified type NEC D89.49
        ICD-10-CM Diagnosis Code D89.49

        Other mast cell activation disorder

          2017 - New Code 2018 2019 2020 Billable/Specific Code
        Applicable To
        • Other mast cell activation syndrome