ICD-10-CM Diagnosis Code (2025)
Official Description for D89.40
Mast cell activation, unspecified
Coding Notes & Guidelines for D89.40
Inclusion Terms
- Mast cell activation disorder, unspecified
- Mast cell activation syndrome, NOS
Parent Code (Less Specific):
About ICD-10-CM Code D89.40 (Mast cell activation)
ICD-10-CM code D89.40 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM D89.40 became effective on October 1, 2024.
This page provides detailed information about D89.40 - Mast cell activation, unspecified. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Mast cell activation related to unspecified.