ICD-10 Code: D89.42 – Idiopathic mast cell activation syndrome

ICD-10 code D89.42 corresponds to Idiopathic mast cell activation syndrome. This code is classified under the chapter D89 Other disorders involving the immune mechanism, not elsewhere classified, which is part of the category.

The parent chapter is Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.