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Antineutrophil cytoplasmic antibody-associated vasculitis

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Necrotizing vasculitis, with few or no immune deposits, predominantly affecting small vessels (i.e., capillaries, venules, arterioles and small arteries), associated with MPO-ANCA or PR3-ANCA. Not all patients have ANCA. Add a prefix indicating ANCA reactivity, e.g. PR3-ANCA, MPO-ANCA, ANCA-negative.

sections/codes in this section (4A44.A-4A44.A)

• Microscopic polyangiitis  (4A44.A0)
• Granulomatosis with polyangiitis  (4A44.A1)
• Eosinophilic granulomatosis with polyangiitis  (4A44.A2)
• Other specified antineutrophil cytoplasmic antibody-associated vasculitis  (4A44.AY)
• Antineutrophil cytoplasmic antibody-associated vasculitis, unspecified  (4A44.AZ)

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