M31.11
Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 11 never code together
M30-M36block
Excludes1
- autoimmune disease, single organ or single cell-type -code to relevant condition category
M00-M99chapter
Excludes2
- arthropathic psoriasis (L40.5-)L40.5-
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- compartment syndrome (traumatic) (T79.A-)T79.A-
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 22
M31.11code
Inclusion terms
- Transplant-associated thrombotic microangiopathy [TA-TMA]
Code first
Use additional code
- code to identify specific organ dysfunction, such as:
- acute kidney failure (N17.-)N17.-
- acute respiratory distress syndrome (J80)J80
- capillary leak syndrome (I78.8)I78.8
- diffuse alveolar hemorrhage (R04.89)R04.89
- encephalopathy (metabolic) (septic) (G93.41)G93.41
- fluid overload, unspecified (E87.70)E87.70
- graft versus host disease (D89.81-)D89.81-
- hemolytic uremic syndrome (D59.3-)D59.3-
- hepatic failure (K72.-)K72.-
- hepatic veno-occlusive disease (K76.5)K76.5
- idiopathic interstitial pneumonia (J84.11-)J84.11-
- sinusoidal obstruction syndrome (K76.5)K76.5
M30-M36block
Includes
- autoimmune disease NOS
- collagen (vascular) disease NOS
- systemic autoimmune disease
- systemic collagen (vascular) disease
M00-M99chapter
Notes
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Index entries leading here 2
Alongside this code 2 same parent — M31.1
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.