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HelpTest Code GENTA Gentamicin
Additional Codes
| Epic Ordering Code (Peak) | LAB26 |
| Epic Ordering Code (Random) | LAB27 |
| Epic Ordering Code (Trough) | LAB28 |
| NBS code | LBC05657 |
| Service code | 31813 |
Specimen Requirements
Submit only one of the following:
| Preferred: | Acceptable: |
| Yellow Top | Light Green Top |
Processing Requirements
Allow specimen to clot for 30 mins (Yellow Top) and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5mL
Specimen Stability
| Specimen Type | Serum/Plasma |
|---|---|
| Ambient | Not available |
| Refrigerate | 7 days |
| Frozen | 14 days |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Particle-Enhanced Turbidimetric Inhibition Immunoassay (PETINIA)
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Traditional Dosing | |
|---|---|
| Peak level | 5 – 10 mg/L |
| Trough level | < 2 mg/L |
Once daily dosing: refer to Nomogram or in-house guideline for Gentamicin
Critical value: > 13.0 mg/L
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Therapeutic drug monitoring.
Update
Last updated 17/07/2026
LOINC Code Information
| Gentamicin, Peak | 3663-2 |
| Gentamicin, Random | 35668-3 |
| Gentamicin, Trough | 3665-7 |