| Test Name (Click to sort by popular result) | COE Code |
| G-6-PD, Qualitative Screen | G6PD |
| G-6-PD, Quantitative | ML MISC |
| G-Glutamyl Transpeptidase | GGTP |
| Gabapentin | GABA |
| Galactose-1-Phosphate Uridyltransferase, Blood | ML MISC |
| Galactose-1-Phosphate, Erythrocytes | ML MISC |
| Gamma Hydroxy Butyrate, Urine | ML MISC |
| Ganglioside Antibody Panel | ML MISC |
| Gastric Brushings Cytology | GASB |
| Gastric Washings Cytology | GASW |
| Gastric, AFB Culture | BAFB |
| Gastrin, Serum | RGAST |
| Gentamicin | GENT R/GENT PK/GENT TR |
| Giardia Antibody | ML MISC |
| Giardia Antigen, Stool | GAG |
| Gliadin Antibody, IgA | GLADA |
| Gliadin Antibody, IgG | GLADG |
| Glomerular Basement Membrane Antibody | AGBM |
| Glucagon, Plasma | GLP |
| Glucose, CSF | GLCSF |
| Glucose, Fluid | GLUCF |
| Glucose, Serum | GLUC/GLUC1PP/GLUC2PP/GLUC3/GLUC5 |
| Glucose, Urine | GLUCU/GLUCQ |
| Glutamic Acid Decarboxylase Antibody | GAD65 |
| Glutamic Acid Decarboxylase Antibody, CSF | GAD65C |
| Gram Stain Smear | GSO |
| Gram Stain, Fecal Leukocyte Screen | FGST |
| Growth Hormone | GH |
| Growth Hormone Antibody | ML MISC |