D89.40 – Mast cell activation, unspecified
Coding Notes
Active
Billable, valid for HIPAA-covered transactions
Applicable To
Mast cell activation disorder, unspecified
Mast cell activation syndrome, NOS
GEM Conversion to ICD-9 CM
MDC / MS-DRG Reference
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Sibling Codes
Parent Sibling Codes
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| Code | Title |
|---|---|
| D50-D89 | Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) |
| D80-D89 | Certain disorders involving the immune mechanism (D80-D89) |
| D89 | Other disorders involving the immune mechanism, not elsewhere classified |
| D89.4 | Mast cell activation syndrome and related disorders |
| D89.40 |
Mast cell activation, unspecified
Applicable to
Mast cell activation disorder, unspecified
Mast cell activation syndrome, NOS
|