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HelpTest Code CA Calcium, serum
Additional Codes
| Epic Ordering Code | LAB3041899 |
| NBS code | LBC03972 |
| Service code | 31021 |
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 | 7 days |
| Refrigerate | 3 weeks |
| Frozen | 8 months |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Lipaemia | Alert/Reject |
| Others | Not applicable |
Methodology
Colorimetry
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Age | |
|---|---|
| 0 – < 1 wk | 1.85 – 2.80 mmol/L |
| 1 wk – < 6 mths | 2.20 – 2.80 mmol/L |
| 6 mths – 1 yr | 2.20 – 2.70 mmol/L |
| 2 – 17 yrs | 2.20 – 2.65 mmol/L |
| ≥ 18 yrs | 2.10 – 2.60 mmol/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation of calcium metabolism
Update
Last updated 16/07/2026
LOINC Code Information
2000-8