M31.1
M31.1: Thrombotic microangiopathy
Non-billable headerICD-10-CM
M31.1 is a non-billable header ICD-10-CM code for thrombotic microangiopathy. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with M31.1
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead M31.1
3 child codes. Green means billable.
Other codes under M31
- M31.0Hypersensitivity angiitis
- M31.2Lethal midline granuloma
- M31.3Wegener's granulomatosis
- 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