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D89.42 – Idiopathic mast cell activation syndrome

Idiopathic mast cell activation syndrome

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D89.42 – Idiopathic mast cell activation syndrome
Andrew Saurin

Medicare CPT / Coverage Preview

Medicare CPT / Coverage Preview
ICD-10: D89.42
Raw ICD: D8942
Context: D89.42 – Idiopathic mast cell activation syndrome
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Title

D89.42 – Idiopathic mast cell activation syndrome

Description

Idiopathic mast cell activation syndrome

Category

Diseases of the Blood and Blood-forming Organs and Certain Disorders Involving the Immune Mechanism

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D89.42 – Idiopathic mast cell activation syndrome

ICD-10-CM Code

D89.42

Raw ICD Code

D8942

Code Range

D50-D89

Billable / Valid

Valid/Billable

CDC Order Number

03868

Source Year

FY2026

Effective Date

October 1, 2025

Import Batch

icd10cm-fy2026-batch02-of30