M31.11 — Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]
Is M31.11 billable?
Yes — M31.11 is billable for FY2027. M31.11 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M31.11 may be submitted for encounters from October 1, 2026 through September 30, 2027.
M31.11 at a glance
| Code | M31.11 |
|---|---|
| Description | Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA] |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M31.11 group to?
M31.11 sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 545Connective Tissue Disorders with MCCmedical
- 546Connective Tissue Disorders with CCmedical
- 547Connective Tissue Disorders without CC/MCCmedical
As a secondary diagnosis, M31.11 is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is M31.11 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to M31.11. They show the wording a clinician may have documented, which often differs from the Tabular description.
- HSCT-TMA (hematopoietic stem cell transplantation-associated thrombotic microangiopathy)
- Microangiopathy › thrombotic › hematopoietic stem cell transplantation-associated [HSCT-TMA] (peripheral)
Code first
The underlying condition below must be sequenced before M31.11. M31.11 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code
Report an additional code alongside M31.11 to fully describe the condition. M31.11 is sequenced first.
- code to identify specific organ dysfunction, such as:
- acute kidney failure (N17.-)
- acute respiratory distress syndrome (J80)
- capillary leak syndrome (I78.8)
- diffuse alveolar hemorrhage (R04.89)
- encephalopathy (metabolic) (septic) (G93.41)
- fluid overload, unspecified (E87.70)
- graft versus host disease (D89.81-)
- hemolytic uremic syndrome (D59.3-)
- hepatic failure (K72.-)
- hepatic veno-occlusive disease (K76.5)
- idiopathic interstitial pneumonia (J84.11-)
- sinusoidal obstruction syndrome (K76.5)
Inclusion terms
Alternative wording in documentation that is classified to M31.11.
- Transplant-associated thrombotic microangiopathy [TA-TMA]
Excludes1 — never code together — inherited from M30-M36
The conditions below can never be reported together with M31.11 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- autoimmune disease, single organ or single cell-type -code to relevant condition category
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M31.11, but a patient may have both at the same time. When documentation supports it, M31.11 and the excluded code may both be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
How long has M31.11 existed?
M31.11 first appears in FY2022.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.