Home
HelpTest Code TSH Thyroid Stimulating Hormone (TSH)
Additional Codes
| Epic Ordering Code | LAB129 |
| NBS code | LBC13056 |
| Service code | 31622 |
Specimen Requirements
Submit the following:
| Container: |
| Yellow Top |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Age | |
|---|---|
| 4 days – 5 mths | 0.73 – 4.77 mIU/L |
| 6 mths – 13 yrs | 0.70 – 4.17 mIU/L |
| 14 yrs – 18 yrs | 0.47 – 3.41 mIU/L |
| ≥ 19 yrs | 0.35 – 4.94 mIU/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of hyperthyroidism and hypothyroidism.
Monitor thyroxine replacement or suppression therapy.
Distinguish non-thyroidal illness (NTI) from hyperthyroidism.
Update
Last updated 28/07/2026
LOINC Code Information
11580-8
Specimen Condition
| Gross Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 24 hours |
| Refrigerate | 7 days |
| Frozen | 6 months |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5ml