The 10 most frequent diagnoses associated with CRP test requests in the ED
| ICD-10 code | Description | n |
| J18 | Pneumonia | 885 |
| R50 | Fever | 475 |
| N39 | Disorders of the urinary system, including urinary tract infection | 386 |
| R10 | Abdominal and pelvic pain | 315 |
| J44 | Chronic obstructive pulmonary disease | 308 |
| I50 | Heart failure | 301 |
| A09 | Diarrhoea and gastroenteritis | 265 |
| J98 | Other respiratory disorders | 202 |
| O42 | Premature rupture of membranes | 199 |
| R51 | Headache | 182 |
CRP, C-reactive protein; ED, emergency department; ICD-10, International Classification of Diseases, version 10.