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HelpTest Code CK Creatine Kinase (CK)
Additional Codes
| Epic Ordering Code | LAB62 |
| NBS code | LBC04194 |
| Service code | 31051 |
Specimen Requirements
Submit only one of the following immediately:
Preferred: Gold Top
Acceptable: Green Top (Li Heparin)
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum/Plasma
Volume: 0.5 mL
Storage/transport requirements: Refrigerated
Specimen Stability
| Specimen Type | Serum/Plasma |
|---|---|
| Ambient | 2 days |
| Refrigerate | 7 days |
| Frozen | 1 month |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Gross Lipaemia | Alert/Reject |
| Others | Not applicable |
Methodology
Enzymatic Assay
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Age | Male |
|---|---|
| 0 – 12 yrs | 68 – 293 U/L |
| 13 – 17 yrs | 80 – 354 U/L |
| 18 – 59 yrs | 45 – 250 U/L |
| ≥ 60 yrs | 40 – 200 U/L |
| Age | Female |
|---|---|
| 0 – 12 yrs | 68 – 293 U/L |
| 13 – 17 yrs | 48 – 200 U/L |
| ≥ 18 yrs | 30 – 150 U/L |
Critical value: ≥ 10,000 U/L
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation and monitoring disorders of skeletal and cardiac muscle.
LOINC Code Information
2157-6
Alias
Creatine Phosphokinase (CPK)
Update
Last updated 07/04/2026