AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2013 Issue 1; Ask the Editor - ICD-10-CM/PCS Coding Questions
Clarification of Categories I21 and I22
A note was deleted from the 2012 ICD-10-CM Tabular List of Diseases and Injuries. The note at code I22, Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction, stated: A code from category I22 must be used in conjunction with a code from category I21. The I22 code should be sequenced first, if it is the reason for the encounter, or, it should be sequenced after the I21 code if the subsequent MI occurs during the encounter for the initial MI. Is the information in the note no longer valid? ...
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Article Overview
This short coding update discusses a change to the ICD-10-CM Tabular List related to categories I21 and I22. It is relevant to coders, auditors, and documentation staff who track diagnosis coding guidance for myocardial infarction and want to understand how the published clarification affects the surrounding tabular instructions.
Why This Topic Matters
Changes to tabular notes can affect diagnosis code reporting, sequencing, and consistency across inpatient and outpatient coding workflows. This article helps readers recognize that the guidance was updated and identify the coding area affected without relying on the premium text.
What You Will Learn
- Which ICD-10-CM categories are involved in the clarification
- What type of tabular-list change was made
- Why the update matters for diagnosis coding workflows
- How to evaluate whether the article applies to myocardial infarction coding topics
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation staff
- Compliance teams
- Revenue cycle professionals
Codes Discussed
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