D89.43

Billable

Secondary mast cell activation

D89.43 is the ICD-10-CM code for Secondary mast cell activation. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
D50-D89
Parent
D89.4
Edition
FY2026

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

Includes

  • Secondary mast cell activation syndrome

Notes

  • underlying etiology, if known

Frequently asked questions

What is ICD-10 code D89.43?
D89.43 is the ICD-10-CM code for "Secondary mast cell activation". It falls under D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
Is D89.43 a billable code?
Yes — D89.43 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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