Table 1.
Diagnosis and procedure codes
| Diagnosis or Procedure | ICD‐9‐CM or CCS Codes |
|---|---|
| Inclusion criteria | |
| NSTEMI | 410.7, 410.70–410.72, 411.1 |
| CKD | 585.1–585.5, 585.9 |
| BMS and DES | 36.06, 36.07 |
| Exclusion criteria | |
| ESRD | 585.6 |
| Dialysis | 39.95, 54.98 |
| Valvular or CABG surgery | Procedure CCS: 43 and 44 |
| STEMI | 410.×1 (410.01–410.91) |
| Comorbidities | |
| Prior MI | 412 |
| Smoking | V15.82, 305.1 |
| Dyslipidemia | CCS code: 53 |
| Acute CVA | CCS code: 109 |
| Prior revascularization | V45.81, V45.82 |
| Chronic ASA use | V58.66 |
| AKI | 584, 585.4–585.9 |
| Family history of CAD | V17.3 |
| Cardiogenic shock | 785.51 |
| Ventricular arrhythmias | 427.1, 427.4, 427.41, 427.42 |
Abbreviations: AKI, acute kidney injury; ASA, acetylsalicylic acid (aspirin); BMS, bare‐metal stents; CABG, coronary artery bypass grafting; CAD, coronary artery disease; CCS, Clinical Classification Software; CKD, chronic kidney disease; CVA, cerebrovascular accident; DES, drug‐eluting stents; ESRD, end‐stage renal disease; ICD‐9‐CM, International Classification of Diseases, Ninth Revision, Clinical Modification; MI, myocardial infarction; NSTEMI, non–ST‐segment elevation myocardial infarction; STEMI, ST‐segment elevation myocardial infarction.