Is M31 a billable code?
No. M31 is a header code that groups 13 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
M31: Other necrotizing vasculopathies
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
M31 groups related diagnoses under other necrotizing vasculopathies. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under M31
- M31.0Hypersensitivity angiitis
- M31.10Thrombotic microangiopathy, unspecified
- M31.11Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]
- M31.19Other thrombotic microangiopathy
- M31.2Lethal midline granuloma
- M31.30Wegener's granulomatosis without renal involvement
- M31.31Wegener's granulomatosis with renal involvement
- M31.4Aortic arch syndrome [Takayasu]
- M31.5Giant cell arteritis with polymyalgia rheumatica
- M31.6Other giant cell arteritis
- M31.7Microscopic polyangiitis
- M31.8Other specified necrotizing vasculopathies
- M31.9Necrotizing vasculopathy, unspecified
M31 questions
What does M31 mean?
M31 is the ICD-10-CM code for Other necrotizing vasculopathies. It is in chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99).
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.