Table 1.
Diagnostic classifications and specific ICD‐9‐CM codes
| Diagnostic classifications | Subclassifications | ICD‐9‐CM codes | CPT codes |
|---|---|---|---|
| Chronic cardiac diseases | Cardiomyopathies | 425.0‐425.4, 429.1 | |
| Single‐ventricle physiology | 397.0, 745.3, 745.7, 746.1, 746.7, 746.89 | ||
| Single‐ or double‐ventricle physiology | 745.11, 745.60, 746.01, 746.2, 746.84, 747.22 | 33468, 33615‐33617, 33619, 33766‐33768a | |
| Double‐ventricle physiology | 745.0, 745.1, 745.2, 745.4, 745.5, 745.61‐745.69, 745.9, 746.02, 746.09, 746.3‐746.6, 747.1‐747.20, 747.29‐747.49 | ||
| Conduction disorders/dysrhythmias | 426.0, 426.13, 426.7, 426.8, 427.0‐427.4, 427.6‐427.9 | ||
| Acquired chronic cardiac conditions | 393, 394.0‐394.4, 395.0‐395.9, 396.0‐396.9, 397.0‐397.9, 398.0, 398.90‐398.91 | ||
| Venous thromboembolism | Cerebral sinus thrombosis | 325 | 33910, 33915, 33916, 34401, 34421, 34451, 34471, 34490, 37187, 37188 |
| Pulmonary embolism | 415.1, 415.11, 415.12, 415.19 | ||
| Lower‐extremity DVT | 451.1x, 451.2, 451.81, 453.4x | ||
| Upper‐extremity DVT | 451.83, 451.84, | ||
| Renal vein thrombosis | 453.3 | ||
| Other DVT | 451.89, 451.9, 452, 453, 453.2, 453.8, 453.9, 572.1 | ||
| Thrombectomy | 38.07, 38.09 | ||
| Noncardiac CCCa | Cardiac codes omitted | ||
| Trauma | 800‐904.9, 925‐929.9, 940.0‐959.9 | ||
| Cardiac surgery | 35.00‐35.99, 36.0‐36.99, 37.0‐37.49, 37.52‐37.99, 38.00‐38.99, 39.0‐39.99 | Table S1 | |
| Heart transplantation | 37.51 | ||
| ECMO/CPB | 39.61, 39.65 | ||
| Acquired cardiac conditions | 391.0‐391.9, 392.0, 410.0‐410.9, 411.0‐411.89, 413.0‐413.9, 415.0, 420.0‐420.99, 421.0‐421.9, 422.0‐422.99, 425.9, 428.1, 428.21, 428.23, 428.31, 428.33, 428.41, 428.43, 441.0‐441.03, 441.1, 441.3, 441.5, 441.6, 446.1 | ||
| Infections | Septicemia | MEPS Category 2, 38.12, 771.81, 995.1, 995.92 | |
| Pneumonia | MEPS Category 122, 487.0, 482.42 | ||
| Urinary tract infections | MEPS Category 159 | ||
| Cellulitis | MEPS Category 197, 528.3 | ||
| Abdominal infections | MEPS Category 142 and 148, 567.31 | ||
| Skeletal infections | MEPS Category 201 |
CCC, complex chronic conditions; CPB, cardiopulmonary bypass; CPT, Current Procedural Terminology; DVT, deep vein thrombosis; ECMO, extracorporeal membranous oxygenation; ICD‐9‐CM, International Classification of Diseases, 9th Revision, Clinical Modification; MEPS, Medical Expenditure Panel Survey.
a
CPT codes were used to classify patients with single‐ or double‐ventricle physiology ICD‐9 codes. If CPT code was also present, patients were classified as single‐ventricle. If not present, patients were classified as double‐ventricle.