D89.49
D89.49: Other mast cell activation disorder
Billable / specific codeICD-10-CM
D89.49 is a billable, specific ICD-10-CM code for other mast cell activation disorder. It is valid for submission on a claim.
Check D89.49 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Other mast cell activation syndrome
Excludes1 inherited from the categories above D89.49
A category’s note binds every code beneath it.
Written on D89.4: Mast cell activation syndrome and related disorders
- 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)
Excludes2 inherited from the categories above D89.49
Not part of this code, but both may be coded when both are present.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
D89.49 is named in 11 Medicare coverage policies: 11 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56638Billing and Coding: Gastrointestinal Pathogen (GIP) Panels Utilizing Multiplex Nucleic Acid Amplification Techniques (NAATs)
- A56642Billing and Coding: Gastrointestinal Pathogen (GIP) Panels Utilizing Multiplex Nucleic Acid Amplification Techniques (NAATs)
- A57689Billing and Coding: Lab: Flow Cytometry
- A58575Billing and Coding: Respiratory Pathogen Panel Testing
Alphabetic index entries that lead here
- Activation›mast cell›specified type NEC
Code history
Unchanged in every release from FY2024 to FY2027.