M31.9 Necrotizing vasculopathy, unspecified
Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.
Risk adjustment (HCC)
- CMS-HCC V28: HCC 94 — Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders
- CMS-HCC V22: HCC 108 — Vascular Disease
- ESRD V24: HCC 108
MS-DRG index
Defines the logic of DRG(s) 299-301 in MDC 05.
Approximate ICD-9-CM (GEMs)
447.5 Necrosis of artery (approximate)
Code annotations containing back-references to M31.9
Back-references to M31
- Type 2 Excludes:
I77 Other disorders of arteries and arterioles ("collagen (vascular) diseases (M30-M36)") - Type 2 Excludes:
J82 Pulmonary eosinophilia, not elsewhere classified ("pulmonary eosinophilia due to systemic connective tissue disorders (M30-M36)") - Code First:
J84.170 Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere ("systemic connective tissue disorders (M30-M36)") - Type 1 Excludes:
L94 Other localized connective tissue disorders ("systemic connective tissue disorders (M30-M36)")
Diagnosis Index entries for M31.9
- Angiitis › necrotizing
- Arteritis › necrosing or necrotizing
- Vasculopathy, necrotizing
Nearby codes
M31.4 Aortic arch syndrome [Takayasu]M31.5 Giant cell arteritis with polymyalgia rheumaticaM31.6 Other giant cell arteritisM31.7 Microscopic polyangiitisM31.8 Other specified necrotizing vasculopathiesM31.9 Necrotizing vasculopathy, unspecified (this code)