Coding Ischemic Heart Disease (410-414)

This article provides information and guidelines on the following important considerations in the assignment of codes from the 410-414 (ischemic heart disease) series: clarification of category assignments, current patient care protocols, and limitations caused by the diagnosis-related group (DRG) system. Atherosclerosis Note: As of October 1, 1994, code 414.0 has been expanded to fifth digits to indicate specific site of coronary atherosclerosis. Arteriosclerotic coronary artery disease and atherosclerosis of the coronary artery are interchangeable terms classifiable to 414.0. Arteriosclerosis is a generic term that may be further delineated as to type. For example, atherosclerosis or atheroma is...

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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 premium article covers ICD-9-CM coding considerations for ischemic heart disease and related coronary conditions. It explains the broad scope of category assignment issues, documentation specificity, postmyocardial infarction scenarios, and procedure coding context that can affect reporting and DRG-related handling. It is intended for coders, CDI staff, and clinical documentation stakeholders who need to understand how these diagnoses and related services are discussed in the ICD-9-CM environment.

Why This Topic Matters

Accurate classification of ischemic heart disease affects diagnosis reporting, specificity in documentation, and downstream grouping or utilization processes. The article is useful for anyone reviewing coronary disease cases, post-infarction records, or cardiac procedures in an ICD-9-CM setting.

Article Sections

  1. Atherosclerosis

    Covers general concepts related to coronary atherosclerosis and how terminology may be discussed in relation to ischemic heart disease classification. Also addresses documentation specificity and category-level considerations.

  2. Asymptomatic or Presymptomatic Atherosclerotic Coronary Disease

    Addresses asymptomatic or presymptomatic coronary disease and the kinds of diagnostic findings that may be referenced in the record. Includes discussion of related post-infarction context.

  3. Acute Ischemia

    Focuses on acute coronary or myocardial ischemia, distinctions between ischemia and infarction, and related documentation and reporting considerations. Also references associated procedures and care context.

  4. Postmyocardial Infarction, Eight Weeks or Less from Date of Infarction

    Discusses cases occurring within weeks of a myocardial infarction and the broader types of post-infarction assessments that may appear in the record. Includes diagnostic-study context and related sequelae considerations.

  5. Acute Myocardial Infarction

    Covers acute infarction documentation, site specificity, and the coding context for common complications or associated findings. Also includes procedure-related references used in acute care settings.

  6. Procedures

    Lists procedures commonly used in the management and evaluation of ischemic heart disease, including catheter-based studies, imaging, revascularization-related services, and pacing-related procedures.

What You Will Learn

  • How the article frames ischemic heart disease classification topics within ICD-9-CM
  • Which general documentation issues can affect coronary diagnosis specificity
  • How acute, chronic, and post-infarction situations are organized in the article
  • What kinds of cardiac procedures are discussed in connection with ischemic heart disease
  • Which broader coding and DRG-related considerations are highlighted for these records

Who Should Read This

  • Medical coders
  • Coding auditors
  • Clinical documentation improvement staff
  • Health information management professionals
  • Physicians involved in documentation improvement

Codes Discussed

  • ICD-9-CM: 414.0
  • ICD-9-CM: 414.9
  • ICD-9-CM: 093.89
  • ICD-9-CM: 710.0
  • ICD-9-CM: 746.85
  • ICD-9-CM: 413.9
  • ICD-9-CM: 414.8
  • ICD-9-CM: 412
  • ICD-9-CM: 410.9
  • ICD-9-CM: 428.9
  • ICD-9-CM: 99.10
  • ICD-9-CM: 411.8
  • ICD-9-CM: 411.1
  • ICD-9-CM: 99.29
  • ICD-9-CM: 99.20
  • ICD-9-CM: 410.0
  • ICD-9-CM: 410.0-410.8
  • ICD-9-CM: 410.0-410.9
  • ICD-9-CM: 37.21
  • ICD-9-CM: 37.23
  • ICD-9-CM: 88.52
  • ICD-9-CM: 88.54
  • ICD-9-CM: 414.10
  • ICD-9-CM: 411.0
  • ICD-9-CM: 37.61
  • ICD-9-CM: 89.54
  • ICD-9-CM: 89.63
  • ICD-9-CM: 89.65
  • ICD-9-CM: 89.68
  • ICD-9-CM: 88.50
  • ICD-9-CM: 37.22
  • ICD-9-CM: 88.53
  • ICD-9-CM: 89.41
  • ICD-9-CM: 89.44
  • ICD-9-CM: 87.42
  • ICD-9-CM: 92.05
  • ICD-9-CM: 88.72
  • ICD-9-CM: 36.0
  • ICD-9-CM: 36.02
  • ICD-9-CM: 36.01
  • ICD-9-CM: 38.91
  • ICD-9-CM: 88.55
  • ICD-9-CM: 39.61
  • ICD-9-CM: 36.11
  • ICD-9-CM: 36.14
  • ICD-9-CM: 36.15
  • ICD-9-CM: 36.16
  • ICD-9-CM: 36.03
  • ICD-9-CM: 36.1x
  • ICD-9-CM: 37.71
  • ICD-9-CM: 37.77
  • ICD-9-CM: 426.0
  • ICD-9-CM: 424.0
  • ICD-9-CM: 785.51
  • ICD-9-CM: 428.0
  • ICD-9-CM: 88.57
  • ICD-9-CM: 88.56

Code Ranges Discussed

  • ICD-9-CM: 410-414
  • ICD-9-CM: 410.0-410.8
  • ICD-9-CM: 410.0-410.9
  • ICD-9-CM: 88.54-88.57
  • ICD-9-CM: 89.41-89.44
  • ICD-9-CM: 37.21-37.23
  • ICD-9-CM: 36.11-36.14
  • ICD-9-CM: 36.15-36.16
  • ICD-9-CM: 37.71-37.77
  • ICD-9-CM: 00.40-00.43

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