D89.42 - Idiopathic mast cell activation syndrome

Applicable to Idiopathic mast cell activation syndrome
The 2025 edition of ICD10-CM D89.42 became effective on October 1, 2024.
This is the American ICD10-CM version of D89.42 - other international versions of ICD10 D89.42 may differ.
D89.42 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

The following codes above D89.42 contain annotation back-references that may be applicable to D89.42:

Chapter: D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism

Section: D80-D89 Certain disorders involving the immune mechanism

Category: D89 Other disorders involving the immune mechanism, not elsewhere classified

activation icd 10

idiopathic icd 10

syndrome icd 10

Billable/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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