Table 2: Below is an example of a “crosswalk” that you can start to compile for your most commonly used codes in the office. Once you do this you can audit your healthcare professionals’ charts to see if their documentation is adequate for the new ICD-10 codes.

ICD-9-CM Description ICD-10-CM Description
410.00-410.02
410.10-410.12
Acute Myocardial Infarction of anterolateral wall and Acute Myocardial Infarction of other anterior wall I21.09 St elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
410.20-410.22 Acute Myocardial Infarction of inferolateral wall I21.19 St elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
410.30-410.32 Acute Myocardial Infarction of inferoposterior wall and Acute Myocardial Infarction of other inferior wall I21.11 St elevation (STEMI) myocardial infarction involving right coronary artery
410.50-410.52
410.60-410.62
410.80-410.82
Acute Myocardial Infarction of other lateral wall, Acute Myocardial Infarction of true posterior wall infarction and Acute Myocardial Infarction of other specified sites I21.29 St elevation (STEMI) myocardial infarction involving other sites
410.7 Acute Myocardial Infarction of subendocardial infarction I21.4 Acute subendocardial myocardial infarction
410.9 Acute Myocardial Infarction of Unspecified site I21.3 Acute transmural myocardial infarction of unspecified site