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mast cell activation syndrome

Wikipedia Summary

Mast cell activation syndrome (MCAS) is a term referring to one of two types of mast cell activation disorder (MCAD); the other type is idiopathic MCAD. MCAS is an immunological condition in which mast cells, a type of white blood cell, inappropriately and excessively release chemical mediators, such as histamine, resulting in a range of chronic symptoms, sometimes including anaphylaxis or near-anaphylaxis attacks...
Related Codes (3)
Code
Description
Billable
Details
D89.4Mast cell activation syndrome and related disorders
Type 1 Excludes (11)
D89.41Monoclonal mast cell activation syndrome
D89.42Idiopathic mast cell activation syndrome

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