M31.19

Billable

Other thrombotic microangiopathy

HCC Category Mapping

V28HCC 112 — Von Willebrand Disease and Other Coagulation Defects

0.247

V24HCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.307

ESRDHCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.000

RxHCCHCC 84 — Vasculitis and Other Autoimmune Disorders

0.000

What This Code Means

A condition where small blood vessels become blocked by clots due to causes other than stem cell transplantation, such as certain medications or infections.

Coding Tips

•Document the underlying cause when identified (e.g., drug-induced, infection-related)
•Use when the thrombotic microangiopathy is secondary to a known condition

Clinical Significance

Other thrombotic microangiopathy includes drug-induced, infection-associated, or other secondary forms of TMA not related to transplantation. These conditions still carry significant morbidity and mortality risk, requiring rapid identification of underlying causes and aggressive supportive care.

Documentation Requirements

✓Clinical evidence of thrombotic microangiopathy
✓Documentation of suspected underlying cause
✓Exclusion of transplant-associated TMA
✓Laboratory evidence of microangiopathic process
✓Assessment of organ involvement
✓Treatment response to cause-specific therapy
✓Monitoring for complications
✓Documentation of precipitating factors

Commonly Confused Codes

M31.11 — HSCT-associated TMA (when transplant-related)M31.10 — Thrombotic microangiopathy, unspecified (when cause is identified)D59.3 — Hemolytic-uremic syndrome (when HUS criteria are met)M31.1 — Thrombotic thrombocytopenic purpura (when TTP is diagnosed)T88.7 — Unspecified adverse effect of drug or medicament (when drug-induced)

Code Hierarchy

└M31Other necrotizing vasculopathies └M31.1Thrombotic microangiopathy └M31.19Other thrombotic microangiopathy

└M31.19Other thrombotic microangiopathy