Other Acute and Subacute Forms of Ischemic Heart Disease

Code Revisions Effective October 1, 1989 Category 411 has been revised to include a fifth-digit subclassification to identify coronary embolism or occlusion, without or not resulting in myocardial infarction. These revisions become effective October 1, 1989. The revised codes are as follows: 411 Other acute and subacute forms of ischemic heart disease 411.8 Other 411.81 Acute ischemic heart disease without myocardial infarction Coronary (artery): embolism without or not resulting in myocardial infraction occlusion without or not resulting in myocardial infraction 411.89 Other Coronary insufficiency (acute) Subendocardial ischemia Following are examples of the appropriate use of the...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This coding article covers revisions to an ischemic heart disease category effective October 1, 1989, along with a later note about a separate coronary atherosclerosis code expansion effective October 1, 1994. It is aimed at medical coders and coding educators who need to understand the scope of the revised category, the related examples discussed in the article, and the timing of the cited coding updates.

Why This Topic Matters

Understanding these revisions helps coders identify when the article’s ischemic heart disease category applies and recognize the additional coding references discussed in the guidance. The article also provides historical context for ICD-9-CM changes that may still matter in legacy records, audits, and code mapping work.

Article Sections

  1. Code Revisions Effective October 1, 1989

    Introduces the category revision, its effective date, and the related subclassification structure discussed in the article. It also outlines the broad clinical focus of the revised category.

  2. Examples of the appropriate use of the revised 411 category

    Presents illustrative clinical scenarios showing how the revised category was applied in practice. The section includes a clarification notice tied to later coding clinic guidance.

  3. Note

    Mentions a later effective-date update involving a different coronary atherosclerosis code and its expanded structure.

What You Will Learn

  • The historical scope of the revised ischemic heart disease category
  • The kinds of clinical scenarios illustrated in the article
  • The timing of the cited coding updates
  • A later note referencing expansion of a related coronary atherosclerosis code

Who Should Read This

  • Medical coders
  • Coding auditors
  • Coding educators
  • Clinical documentation staff
  • Healthcare compliance professionals

Codes Discussed

  • ICD-9-CM: 411
  • ICD-9-CM: 411.8
  • ICD-9-CM: 411.81
  • ICD-9-CM: 411.89
  • ICD-9-CM: 413.9
  • ICD-9-CM: 411.1
  • ICD-9-CM: 414.0

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