Creatine Kinase (CK), Total (REFL)

Test Code

26642

CPT Codes
82550

Includes

This is a client specific reflex test. Reflex criteria has been pre-defined by the ordering physician. Additional testing will be performed at an additional charge.

Preferred Specimen

1 mL serum

Minimum Volume

0.5 mL

Other Acceptable Specimens

Sodium heparin (green-top) tube • Lithium heparin (green-top) tube

Instructions

If CK and CK Isoenzymes are ordered together, specimen must be submitted frozen

Transport Container

Serum separator tube (SST)

Transport Temperature

Room temperature

Specimen Stability

Serum and plasma
Room temperature: 72 hours
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Anticoagulants other than heparin

Methodology
Spectrophotometry (SP)

Setup Schedule

Daily

Report Available

1 day

Reference Range

Age	Male (U/L)	Female (U/L)
0-3 days (newborn)	<1578	<1578
4-28 days	<183	<134
1-11 months	<136	<143
1-6 years	<160	<143
7-9 years	<177	<143
10-12 years	<217	<143
13-18 years	<245	<143
>18 years	44-196	29-143

Clinical Significance

Test for myocardial infarction and skeletal muscle damage. Elevated results may be due to: myocarditis, myocardial infarction (heart attack), muscular dystrophy, muscle trauma or excessive exercise.

Performing Laboratory

Quest Diagnostics-Seattle

1737 Airport Way S Suite 200

Seattle, WA 98134-1636

Last Updated: November 6, 2024

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.