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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

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. 

Day(s) Test Set Up

Monday through Sunday



Test Classification and CPT Coding