AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2021 Issue 4; ICD-10-CM New/Revised Codes
Thrombotic Microangiopathy
Code M31.1, Thrombotic microangiopathy, was expanded to identify hematopoietic stem cell transplantation associated microangiopathy (HSCT-TMA), along with unspecified and other specified types of thrombotic microangiopathies as follows:M31.10, Thrombotic microangiopathy, unspecified M31.11, Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA] M31.19, Other thrombotic microangiopathy HSCT-TMA is a serious, life-threatening complication of hematopoietic stem cell transplantation that is caused by endothelial damage. The condition occurs in both autologous and allogeneic transplants but is more common in allogeneic transplants. HSCT-TMA typically presents within the first 100 days post-transplantation. Patients generally present with signs of microangiopathic hemolytic anemia, consumptive...
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Article Overview
This article covers an ICD-10-CM expansion related to thrombotic microangiopathy, including a transplant-associated subtype and related indexing changes. It is intended for coders, CDI professionals, and clinical staff who need to understand how the diagnosis category is organized and what associated transplant and complication references may be relevant. The article also outlines the clinical context of HSCT-related disease and notes linked ICD-10-CM guidance areas referenced in the update.
Why This Topic Matters
Accurate diagnosis classification in this area affects how transplant-related complications and related microangiopathy conditions are captured in coded data. The article is relevant for anyone reviewing coding updates, transplant complications, or diagnosis documentation for hematology and transplant cases.
Article Sections
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ICD-10-CM expansion of thrombotic microangiopathy
Summarizes the diagnosis category update and the addition of more specific subcategories within the broader condition group.
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Clinical context for HSCT-associated microangiopathy
Reviews the transplant-related condition, its general clinical setting, and the types of manifestations described in the article.
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Coding guidance and related references
Discusses associated transplant complication references, additional coding notes, and linked exclusion notes mentioned in the update.
What You Will Learn
- How the diagnosis category was expanded in ICD-10-CM
- What general clinical context is associated with the transplant-related subtype
- Which related coding-reference areas are mentioned alongside the update
- How the article frames transplant complication and exclusion-note considerations at a high level
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation integrity specialists
- Hematology and transplant clinicians
- Revenue cycle professionals
Codes Discussed
Code Ranges Discussed
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