M31.1
ICD-10Non-billable categoryThrombotic microangiopathy
Official ICD-10-CM descriptor (FY2026)
Thrombotic microangiopathy
M31.1 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
ICD-10-CM FY2026 defines 3 codes beneath M31.1. See the ICD-10-CM index for what this site publishes.
Related codes in M31
- M31.0Hypersensitivity angiitis
- M31.2Lethal midline granuloma
- M31.3Wegener's granulomatosiscategory
- 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
Where this code sits
- Parent code
- M31
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.