All ICD10 Codes

M31

Non-Billable
ChapterM00–M99
Rankcategory
Official Description

Other necrotizing vasculopathies

Use a more specific code (8 billable, 2 non-billable)
M31.0Hypersensitivity angiitisM31.1Thrombotic microangiopathyhas subcodesM31.2Lethal midline granulomaM31.3Wegener's granulomatosishas subcodesM31.4Aortic arch syndrome [Takayasu]M31.5Giant cell arteritis with polymyalgia rheumaticaM31.6Other giant cell arteritisM31.7Microscopic polyangiitisM31.8Other specified necrotizing vasculopathiesM31.9Necrotizing vasculopathy, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

CH13 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

M30-M36 Parent Instructions

Includes
  • autoimmune disease NOS
  • collagen (vascular) disease NOS
  • systemic autoimmune disease
  • systemic collagen (vascular) disease
Excludes1(Not coded here. Use a different code.)
  • autoimmune disease, single organ or single cell-type -code to relevant condition category

Clinical Hierarchy

BillableHas subcodes
CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M30-M36Systemic connective tissue disorders (M30-M36)
M31Other necrotizing vasculopathiesNot billable
M31.0Hypersensitivity angiitisBillable
M31.1Thrombotic microangiopathySubcodes
M31.2Lethal midline granulomaBillable
M31.3Wegener's granulomatosisSubcodes
M31.4Aortic arch syndrome [Takayasu]Billable
M31.5Giant cell arteritis with polymyalgia rheumaticaBillable
M31.6Other giant cell arteritisBillable
M31.7Microscopic polyangiitisBillable
M31.8Other specified necrotizing vasculopathiesBillable
M31.9Necrotizing vasculopathy, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M31:

blockM30-M36
Systemic connective tissue disorders (M30-M36)
View context instructions
chapterCH13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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