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ICD-10 章节与代码字母ICD-10 chapters and code letters
ICD-10-CM 标准被划分为21个章节，其代码的首字母通常与所属章节相对应。然而，章节与首字母的映射并非绝对，单个章节可能包含以多个字母开头的代码块。此外，以特定字母（如 D）开头的代码甚至可能跨越多个不同的章节。这揭示了 ICD-10 编码体系在分类结构上的复杂性与非直观性。
John
I’ve been thinking about ICD-10 codes; they come up a lot in my work.
The ICD-10-CM standard is divided into 21 chapters, which generally correspond to the first letter of a code. However, a chapter may contain blocks beginning with more than one letter, and codes starting with a single letter, namely D, can span two chapters.
Here’s a diagram I made to visualize the relationship between chapters and initial letters of codes.
Notice there’s no letter U on the diagram. That’s because U is reserved for special/provisional codes.
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