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HelpTest ID CK Creatine Kinase (CK), Serum
Useful For
Diagnosing and monitoring myopathies or other trauma, toxin, or drug-induced muscle injury
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumNecessary Information
Patient's age and sex are required.
Specimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Serum gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated (preferred) | 7 days |
| Frozen | 28 days | |
| Ambient | 48 hours |
Reference Values
Males
≤3 months: not established
>3 months: 39-308 U/L
Females
≤3 months: not established
>3 months: 26-192 U/L
Reference values have not been established for patients that are less than 3 months of age.
Note: Strenuous exercise or intramuscular injections may cause transient elevation of creatine kinase (CK).
Day(s) Performed
Monday through Sunday
CPT Code Information
82550
Report Available
Same day/1 to 2 daysReject Due To
| Gross hemolysis | Reject |