Is D89.41 a billable code?
Yes. D89.41 is a billable ICD-10-CM code and can be used on claims and superbills for dates of service from October 1, 2026 to September 30, 2027.
ICD-10-CM FY2027 diagnosis code
D89.41: Monoclonal mast cell activation syndrome
Billable codeValid for dates of service October 1, 2026 to September 30, 2027
D89.41 is a billable ICD-10-CM diagnosis code for monoclonal mast cell activation syndrome. It is specific enough to use on an insurance claim, a superbill or a Good Faith Estimate.
Superbill GeneratorStart a superbill with D89.41 already added.Good Faith EstimateStart a cost estimate with D89.41 already added.CMS-1500 Claim FormFill a claim form with D89.41 in box 21.
Other codes in D89.4 Mast cell activation syndrome and related disorders
D89.41 questions
What does D89.41 mean?
D89.41 is the ICD-10-CM code for Monoclonal mast cell activation syndrome. It is in chapter 3, Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.