Skip to content
Dx

ICD-10-CM 2027 diagnosis code

M31.3Wegener's granulomatosis

Not billable — use a more specific code

M31.3 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M31.3

M31.3 is the ICD-10-CM diagnosis code for Wegener's granulomatosis. It belongs to category M31 (other necrotizing vasculopathies), block M30-M36 (systemic connective tissue disorders) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within M31 (other necrotizing vasculopathies), M31.3 is specifically for Wegener's granulomatosis. Related codes cover hypersensitivity angiitis (M31.0), thrombotic microangiopathy (M31.1), Lethal midline granuloma (M31.2), aortic arch syndrome [Takayasu] (M31.4), giant cell arteritis with polymyalgia rheumatica (M31.5), other giant cell arteritis (M31.6), microscopic polyangiitis (M31.7), other specified necrotizing vasculopathies (M31.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: M31.30 (without renal involvement) and M31.31 (with renal involvement).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under M31.3

Coding notes

Applicable toConditions and synonyms classified to this code
  • Granulomatosis with polyangiitis
  • Necrotizing respiratory granulomatosis

Notes that apply from higher levels

Instructions written at a parent level also apply to M31.3.

Broader instructions also apply from M30-M36 Systemic connective tissue disorders and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to M31.3.

Codes whose notes reference M31.3

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M31.3

Is M31.3 billable?

No. M31.3 is a header code. Report one of its more specific subcodes instead.