Mitral stenosis: use the rheumatic code when no other cause

Why This Topic Matters

Accurate code selection for mitral stenosis depends on understanding how ICD-9-CM organizes valve disease terms and how supplementary wording should be interpreted. The article is relevant to coders working with cardiovascular diagnoses and classification guidance.

Article Sections

1. Question

   Introduces the coding question and the apparent conflict between index and tabular references in ICD-9-CM.

2. Answer

   Summarizes the expert guidance on how the diagnosis is classified when limited information is available versus when more detail is documented.

3. Why do you have to use a rheumatic heart disease code for mitral valve stenosis (not otherwise specified)?

   Explains the international context behind the organization of the classification and why the terminology appears under that heading.

4. Get used to it

   Notes the expected stability of this classification approach across versions of the code set.

5. Best bet

   Describes the general resource and lookup approach recommended for finding the relevant diagnosis entry.

6. Here are the codes and conditions you'll find listed there

   Presents the related index entries and cross-references associated with the diagnosis term in the code book.

7. In addition

   Discusses supporting tabular-list references and the effect of supplemental wording in the classification.