M31.1

Non-Billable
ChapterM00–M99
Ranksubcategory
Official Description

Thrombotic microangiopathy

Metadata & Insights
  • Non-billable category (requires more specific sub-code).
  • Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).
General instructions are available for the parent sections:

Clinical Hierarchy

BillableHas subcodes
CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M30-M36Systemic connective tissue disorders (M30-M36)
M31Other necrotizing vasculopathies
M31.1Thrombotic microangiopathyNot billable
M31.10Thrombotic microangiopathy, unspecifiedBillable
M31.11Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]Billable
M31.19Other thrombotic microangiopathyBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M31.1:

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

Code History

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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