Health Information Management

What to expect when coding CAD, MI with ICD-10-CM

HIM-HIPAA Insider, July 23, 2012

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Let's get to the heart of the matter. ICD-10-CM coronary artery disease (CAD) and myocardial infarction (MI) codes will undoubtedly differ from their ICD-9-CM counterparts in some ways, but some aspects will remain the same.

Native and bypass grafts

In ICD-9-CM, CAD ­appears in category 414. ICD-10 code I25.- denotes CAD. Both ICD-9-CM and ICD-10-CM codes indicate whether CAD is in the native artery or a bypass graft. The term "native artery" describes an artery with which a patient is born and that has not been grafted during a coronary artery bypass graft (CABG) procedure. A "bypass graft" is a graft inserted by a surgeon during a CABG procedure to ­bypass a blocked coronary artery.

ICD-10-CM code category I25.1 denotes CAD of a ­native artery. Patients can also have CAD of several types of bypass grafts, including:

  • Unspecified (I25.700-I25.709)
  • Autologous vein (i.e., a vein that originates from the patient, such as the saphenous vein graft in the leg that is used to create a bypass in the coronary ­artery) (I25.710-I25.719)
  • Autologous artery (i.e., an artery that originates from the patient, such as an internal mammary ­artery graft that is used to create a bypass in the coronary artery) (I25.720-I25.729)
  • Non-autologous biological (i.e., the grafting material doesn't originate from the patient) (I25.730-I25.739)

Patients can also have CAD in a transplanted heart. In this scenario, coders should report I25.75- for CAD of the native artery and I25.76- for CAD of a bypass graft.

Editor’s note: Read more in the July issue of Medical Records Briefing.



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