AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2021 Issue 4; ICD-10-CM New/Revised Codes
Thrombocytosis and Essential Thrombocythemia
New subcategory D75.83, Thrombocytosis, has been created to separately identify other thrombocytosis, including secondary thrombocytosis and reactive thrombocytosis (D75.838) and unspecified thrombocytosis (D75.839). The change will allow for differentiation in coding neoplastic cases of essential thrombocythemia and cases of secondary or reactive thrombocytosis, which are not neoplastic in nature. Thrombocythemia and thrombocytosis are characterized by an abnormally high platelet count in the blood. Thrombocytosis (or thrombocythemia) is often described as secondary or reactive, in which another disease, condition, or outside factor causes the high platelet count. Treatment and outlook for secondary thrombocytosis depend on the...
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Article Overview
This article explains a recent ICD-10-CM update involving thrombocytosis and essential thrombocythemia. It is relevant to coders, CDI professionals, and clinical teams who need to understand how cases in this area are being organized for diagnosis reporting. The discussion stays at a high level, covering the general clinical context of elevated platelet counts and the broad distinction between neoplastic and non-neoplastic forms.
Why This Topic Matters
Accurate classification in this area affects how related diagnosis categories are separated and reported in ICD-10-CM. The update helps distinguish different clinical presentations that may otherwise be grouped together, which is important for coding consistency and data quality.
What You Will Learn
- How the topic is framed in relation to ICD-10-CM classification
- The general clinical context of elevated platelet counts
- Why different forms of thrombocytosis are separated for coding purposes
- How the article positions essential thrombocythemia within the broader discussion
Who Should Read This
- Medical coders
- Coding educators
- Clinical documentation improvement professionals
- Revenue cycle staff
- Healthcare analysts
Codes Discussed
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