Cardiology Coding Alert

Question: Which ICD-10 code should I report for myocardial infarction type 3? I don’t see it listed in the ICD-10 manual with a code descriptor.

Nevada Subscriber

Answer: You should report I21.A9 (Other myocardial infarction type) for myocardial infarction type 3. If you look under this code in the ICD-10 manual, you will see that myocardial infarction type 3 is an included condition for I21.A. Other included diagnoses with this code are as follows:

• Myocardial infarction associated with revascularization procedure
• Myocardial infarction type 4a
• Myocardial infarction type 4b
• Myocardial infarction type 4c
• Myocardial infarction type 5.

Don’t miss: Category I21.A9 has a few specific instructions for you to follow.

First, you should also code first any known complications, if applicable. The ICD-10 manual lists the following as examples: acute stent occlusion (T82.897-); acute stent stenosis (T82.857-); acute stent thrombosis (T82.867-); cardiac arrest due to underlying cardiac condition (I46.2); complication of percutaneous coronary intervention (PCI) (I97.89); and occlusion of coronary artery bypass graft (T82.218-).

Additionally, you should follow the “Code first” note related to complications and for coding of postprocedural myocardial infarctions during or following cardiac surgery.