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HelpTest Code 24OXA Oxalate, urine, 24 hr
Additional Codes
| Epic Ordering Code | LAB421 |
| NBS code | LBC00758 |
| Service code | 31973 |
Specimen Requirements
Submit the following:
| Container: |
| 24 Hr Urine Container |
Preservative types accepted: Thymol, 6N HCL
Processing Requirements
Specimen type: 24hr Urine
Volume: Cumulative urine collection over 24 hours
Specimen Stability
| Specimen Type | 24 hr urine |
|---|---|
| Ambient | Not available |
| Refrigerate | 1 week (preferred) |
| Frozen | 1 month |
Specimen Condition
| Haemolysis | Not applicable |
|---|---|
| Icterus | Not applicable |
| Lipaemia | Not applicable |
| Others: Urine not preserved with 6N HCL OR 3.0 g Thymol during collection | Reject |
Methodology
Spectrophotometry
Days and Times Performed
Friday, TAT 2 - 8 days
Reference Interval
| Age | Male | Female |
|---|---|---|
| 0 to < 18 yrs (per m2 BSA) |
< 0.5 mmol/day/1.73m2 |
|
| ≥ 18 yrs | 0.08 – 0.49 mmol/day | 0.04 – 0.32 mmol/day |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724399
Useful For
Investigation of renal calculi
Update
Last updated 31/07/2026
LOINC Code Information
| Oxalate, urine, 24 hr | 14862-7 |
|---|---|
| Oxalate, urine | 15086-2 |
| Urine volume, total | 3167-4 |