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HelpTest Code TYP Thyroid Screen in Pregnancy
Additional Codes
| Epic Ordering Code | LAB3040178 |
| NBS code | LBC13061 |
| Service code | 31620 |
Specimen Requirements
Submit the following:
| Container: |
| Yellow Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5ml
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 24 hours |
| Refrigerate | 6 days |
| Frozen | 1 month |
Specimen Condition
| Gross Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Trimester | TSH (mIU/L) | FT4 (pmol/L) |
|---|---|---|
| 1 | 0.16 – 3.78 | 10.9 – 17.7 |
| 2 | 0.34 – 3.51 | 9.3 – 15.2 |
| 3 | 0.34 – 4.32 | 7.9 – 14.1 |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of thyroid disorders.
Monitoring thyroxine replacement or suppression therapy.
Update
Last updated 28/07/2026
LOINC Code Information
See individual test listings for LOINC code information.
Panel Information
Panel includes the following tests: