D89.4 - Mast cell activation syndrome and related disorders
- Applicable to Mast cell activation syndrome and related disorders
- The 2025 edition of ICD10-CM D89.4 became effective on October 1, 2024.
- This is the American ICD10-CM version of D89.4 - other international versions of ICD10 D89.4 may differ.
- D89.4 is a Non-Billable / Non-Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- D89.4 Code should not be used for billing or reimbursement purposes as there are multiple ICD-10 CM codes below it that contain a greater level of detail.
- D89.4 - Mast cell activation syndrome and related disorders
- D89.4 - Mast cell activation syndrome and related disorders
- D89.40 - Mast cell activation, unspecified
- D89.41 - Monoclonal mast cell activation syndrome
- D89.42 - Idiopathic mast cell activation syndrome
- D89.43 - Secondary mast cell activation
- D89.44 - Hereditary alpha tryptasemia
- D89.49 - Other mast cell activation disorder
Type 1 Excludes
- aggressive systemic mastocytosis (C96.21)
- congenital cutaneous mastocytosis (Q82.2)
- (non-congenital) cutaneous mastocytosis (D47.01)
- (indolent) systemic mastocytosis (D47.02)
- malignant mast cell neoplasm (C96.2-)
- malignant mastocytoma (C96.29)
- mast cell leukemia (C94.3-)
- mast cell sarcoma (C96.22)
- mastocytoma NOS (D47.09)
- other mast cell neoplasms of uncertain behavior (D47.09)
- systemic mastocytosis associated with a clonal hematologic non-mast cell lineage disease (SM-AHNMD) (D47.02)
The following codes above D89.4 contain annotation back-references that may be applicable to D89.4:
Section: D80-D89 Certain disorders involving the immune mechanism
Category: D89 Other disorders involving the immune mechanism, not elsewhere classified
Non-Billable/Non-Specific Code
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Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
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