Creatinine

Creatinine

Laboratory Fee Schedule

Procedure: BZZ0033A

CPT: 82565


Creatinine
Synonym(s): Serum Creatinine
Requisition Form G-1B
Test Description The measurement of creatinine is used to evaluate kidney function.
Pre-Approval Needed N/A
Supplemental Information Required N/A
Supplemental Form(s) N/A
Performed on Specimens from (sources) Human
Sample/Specimen Type for Testing •   Preferred: Serum from a red top tube transferred to a transport tube
•   Acceptable: Serum from a centrifuged gold top serum separator tube.
Minimum Volume/Size Required 1mL serum
Storage/Preservation Prior to Shipping

•   Collect blood in red top or gold top tube.
•   Allow to clot completely at room temperature.
•   Centrifuge to separate serum from cells within 2 hours of collection.
•   Transfer serum to the transport tube.
•   Store serum cold if testing will occur within 7 days of collection.
•   Store serum frozen if testing will occur after 7 days of collection.
NOTE:  Serum collected in a gold top and not transferred to a transport tube cannot be frozen.

Transport Medium N/A
Specimen Labeling •   Two patient-specific identifiers required (e.g., patient full name, date of birth, Medical record number)
•   Identifiers on specimen must exactly match submission form.

Shipping and Specimen Handling Requirements

•   Shipping and Specimen Handling Requirements • Ship all specimens overnight with enough cold packs or dry ice to maintain specimens at proper temperature until arrival at DSHS Laboratory.
•   Ship according to Dangerous Good Regulations, IATA, and/or CFR 49.
•   Handle as infectious agent using universal precautions.
•   Ship triple-contained in accordance with federal shipping regulations for infectious agents.
•   Ship Monday-Thursday; avoid weekend deliveries
•   Ship cold specimens overnight on ice packs if arriving at laboratory within 7 days from collection. 
•   Ship frozen specimens overnight on dry ice or on ice packs.   
•   Specimens must be received cold/frozen by the laboratory.

Method Quantitative enzymatic
Turn-around Time 4-5 working days after receipt of specimen
Interferences/Limitations Lipemia, hemolysis
Common Causes for Rejection

•   Specimen tube broken/leaked in transit. 
•   Two patient-specific identifiers not met
•   Hemolysis
•   No specimen included with submission form. 
•   Submission form not included with specimen. 
•   Red top tubes have not had serum poured over to a transport tube.
•   Gold top tubes have been frozen. 

Additional Information

Reference Range

Male:  0.3 – 1.3 mg/dL

Female: 0.3 – 1.1 mg/dL

Contact:

•   Telephone: 512-776-6236 or 512-776-2628

•   Fax: 512-776-7221

•   Email: ClinicalChemistry@dshs.texas.gov

Last updated May 28, 2020