Table 1.
International classification of diseases and current procedural terminology codes for complications and comorbidities
| Complication or Comorbidity | International Classification of Diseases – 9 – Clinical Modification Codes |
| Nephropathy | 39.27, 39.42, 39.43, 39.53, 39.93, 39.94, 39.95, 54.98, 55.4, 55.6, 250.4x, 403.xx, 404.xx, 405.01, 405.11, 405.91, 584.xx, 585.xx, 586.xx, 588.xx, 753.0x, 753.1x, 791.xx, V42, V45.1, V56 |
| Neuropathy | 250.6x |
| Retinopathy | 250.5x |
| Foot Ulcer | 707.1x |
| Amputation | 84.1x |
| Myocardial Infarction | 410.0x, 412.x |
| Stroke/Transient ischemic attack | 430.xx – 438.xx |
| Coronary Artery Bypass Surgery | 36.1x, 36.2x, 36.3x |
| Angioplasty | 36.01, 36.02, 36.03, 36.05, 36.09 |
| Complication or Comorbidity | Current Procedural Terminology Codes |
| Nephropathy | 36800, 36810, 36815, 50300, 50340, 50360, 50365, 50370, 50380, 90920, 90921, 90924, 90925, 90935, 90937, 90945, 90947, 90989, 90993, 90997, 90999 |
| Neuropathy | |
| Retinopathy | |
| Foot Ulcer | |
| Amputation | 26910, 27590–27592, 27594, 27596, 27598, 27880–27882, 27884, 27886, 27888, 27889, 28800, 28805, 28810, 28820, 28825 |
| Myocardial Infarction | |
| Stroke | 35301, 35390 |
| Coronary Artery Bypass Surgery | 33510–33545, 33572 |
| Angioplasty | 92980–92984, 92995–92996 |
Receipt of any of the diagnostic or procedure codes listed above in the year prior to the index date was used to measure the presence of a complication or comorbidity.