Creatine and Creatinine, 24-Hour Urine

TEST: 003855
Test number copied
CPT: 82540; 82570
Print Share

Test Includes

Creatine, urine; creatinine, urine; creatine:creatinine ratio; eGFR calculation

Special Instructions

State patient's sex and 24-hour volume on the test request form.

Expected Turnaround Time

3 - 6 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Information

Related Documents

Specimen Requirements

Specimen

Urine (24-hour), frozen

Volume

10 mL aliquot

Minimum Volume

1 mL aliquot (Note: This volume does not allow for repeat testing.)

Container

Plastic urine container

Collection

Collect 24-hour urine, no preservative. Mix well.

Storage Instructions

Freeze

Causes for Rejection

Thawed creatine specimen; 6N HCl, boric acid, or alkali added to collection (Acid or alkali preservative will convert creatine to creatinine, falsely lowering creatine values.)

Test Details

Methodology

Spectrophotometry

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
003855 Creatine+Creatinine, 24-Hr Ur 003477 Creatine,U,mg/dL mg/dL 2149-3
003855 Creatine+Creatinine, 24-Hr Ur 003476 Creatine,24-hr Ur mg/24 hr 2150-1
003855 Creatine+Creatinine, 24-Hr Ur 003860 Creatinine,U mg/dL 20624-3
003855 Creatine+Creatinine, 24-Hr Ur 003861 Creatinine,Ur 24hr mg/24 hr 2162-6
003855 Creatine+Creatinine, 24-Hr Ur 003856 Creatine/Creatinine ratio 13484-1

For Providers

Please login to order a test

Order a Test

© 2021 Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf