Lab Test Directory—Saint Luke's Regional Laboratories
| FAT ACID ESS | Fatty Acid Profile, Essential |
| FAT ACID FREE | Fatty Acids, Free |
| obsolete | Febrile Antibodies Panel |
| F OCCULT | Fecal Occult Blood, Colorectal Neoplasm Screening |
| F OCC IP | Fecal Occult Blood, Diagnostic (non-neoplasm screening) |
| REDUCING SUB | Fecal Reducing Substances |
| FELBAMATE | Felbamate (Felbatol) |
| FENTS | Fentanyl and Metabolites |
| FENTU CONF | Fentanyl Confirmation, Urine |
| REF MISC | Fentanyl QT, Pharmaceutical |