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Test Code CREAT Creatinine, Serum, LAB66



Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements


Preferred: Green-top (lithium heparin) tube

Acceptable: Gold-top serum gel tube or plain red-top tube

Specimen Volume: 0.1 mL of plasma or serum

Stability: Separated serum/plasma samples should be stored at 2 - 8ºC and analyzed

                 within 48 hours.  For longer storage, samples should be frozen at or below   -20 ºC.

Reference Values

0.51-1.17 mg/dL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding


Useful For

Creatinine measurements are used in the diagnosis and treatment of renal diseases, in monitoring renal dialysis, and as a calculation basis for measuring other urine analytes.