FY2027 ICD-10-CM reference
M31: Other necrotizing vasculopathies
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Other necrotizing vasculopathies. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- M31.0: Hypersensitivity angiitisBillable code
- M31.1: Thrombotic microangiopathyNonbillable heading
- M31.2: Lethal midline granulomaBillable code
- M31.3: Wegener's granulomatosisNonbillable heading
- M31.4: Aortic arch syndrome [Takayasu]Billable code
- M31.5: Giant cell arteritis with polymyalgia rheumaticaBillable code
- M31.6: Other giant cell arteritisBillable code
- M31.7: Microscopic polyangiitisBillable code
- M31.8: Other specified necrotizing vasculopathiesBillable code
- M31.9: Necrotizing vasculopathy, unspecifiedBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Source: M00-M99 (chapter, inherited).
Excludes2
arthropathic psoriasis (L40.5-)
Source: M00-M99 (chapter, inherited).
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: M00-M99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: M00-M99 (chapter, inherited).
Excludes2
compartment syndrome (traumatic) (T79.A-)
Source: M00-M99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: M00-M99 (chapter, inherited).
Excludes2
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
Source: M00-M99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: M00-M99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: M00-M99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: M00-M99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: M00-M99 (chapter, inherited).
Includes
autoimmune disease NOS
Source: M30-M36 (section, inherited).
Includes
collagen (vascular) disease NOS
Source: M30-M36 (section, inherited).
Includes
systemic autoimmune disease
Source: M30-M36 (section, inherited).
Includes
systemic collagen (vascular) disease
Source: M30-M36 (section, inherited).
Excludes1
autoimmune disease, single organ or single cell-type -code to relevant condition category
Source: M30-M36 (section, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does M31 mean in FY2027?
The official ICD-10-CM descriptor is Other necrotizing vasculopathies. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is M31 billable in FY2027?
The FY2027 order file marks M31 as a nonbillable heading. Select a complete billable child code.
Does M31 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition