M31.1 Thrombotic microangiopathy

Non-billable header with 3 child codes.

Codes under M31.1

• M31.10 Thrombotic microangiopathy, unspecified
• M31.11 Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]
• M31.19 Other thrombotic microangiopathy

Approximate ICD-9-CM (GEMs)

• 446.6 Thrombotic microangiopathy

Code annotations containing back-references to M31.1

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)")

Nearby codes

• M31 Other necrotizing vasculopathies
• M31.0 Hypersensitivity angiitis
• M31.1 Thrombotic microangiopathy (this code)
• M31.10 Thrombotic microangiopathy, unspecified
• M31.11 Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]
• M31.19 Other thrombotic microangiopathy
• M31.2 Lethal midline granuloma
• M31.3 Wegener's granulomatosis