Table 4 Most frequently ordered reference laboratory add-on tests
From: Impact of add-on laboratory testing at an academic medical center: a five year retrospective study
| Test | % of Total Add-on Orders |
|---|---|
| Helicobacter pylori antibody, IgG | 0.050 % |
| Mitochondrial M2 antibodies | 0.049 % |
| Hepatitis C virus quantitative PCR | 0.033 % |
| IgG subclasses | 0.022 % |
| Miscellaneous testa | 0.019 % |
| Vitamin D, 1,25-dihydroxy | 0.018 % |
| Aldosterone, serum | 0.017 % |
| Alpha-1-antitrypsin, phenotyping | 0.013 % |
| Lyme disease antibodies, IgG and IgM | 0.013 % |
| Histoplasma antigen, urine | 0.013 % |