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Test Code CREP2 Creatinine with Estimated Glomerular Filtration Rate (eGFR), Plasma


Specimen Required


Collection Container/Tube:

Preferred: Light-green top (lithium heparin plasma gel)

Acceptable: Green top (lithium heparin)

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Gel tubes should be centrifuged within 2 hours of collection.

2. Green-top tubes should be centrifuged and the plasma aliquoted into a plastic vial within 2 hours of collection.


Useful For

Diagnosing and monitoring treatment of acute and chronic kidney diseases

 

Adjusting dosage of renally excreted medications

 

Monitoring kidney transplant recipients

 

Estimating glomerular filtration rate for people with chronic kidney disease and those with risk factors for chronic kidney disease, such as individuals with diabetes, hypertension, cardiovascular disease, and family history of kidney disease

Method Name

Enzymatic Colorimetric Assay

Reporting Name

Creatinine with eGFR, P

Specimen Type

Plasma Li Heparin

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time
Plasma Li Heparin Ambient (preferred) 24 hours
  Refrigerated  7 days

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject
Gross icterus Reject

Reference Values

CREATININE

Males (1,2)

0-11 months: 0.17-0.42 mg/dL

1-5 years: 0.19-0.49 mg/dL

6-10 years: 0.26-0.61 mg/dL

11-14 years: 0.35-0.86 mg/dL

15-17 years: 0.74-1.35 mg/dL

≥18 years: 0.74-1.35 mg/dL

 

Females (1,2)

0-11 months: 0.17-0.42 mg/dL

1-5 years: 0.19-0.49 mg/dL

6-10 years: 0.26-0.61 mg/dL

11-15 years: 0.35-0.86 mg/dL

16-17 years: 0.59-1.04 mg/dL

≥18 years: 0.59-1.04 mg/dL

 

ESTIMATED GLOMERULAR FILTRATION RATE (eGFR)

≥18 years old: ≥60 mL/min/BSA (body surface area)

Estimated GFR calculated using the 2021 CKD-EPI creatinine equation

Note: eGFR results are not calculated for patients younger than 18 years old.

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 to 2 days

Performing Laboratory

MCHS- La Crosse Lab

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

82565

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CREP2 Creatinine with eGFR, P 45066-8

 

Result ID Test Result Name Result LOINC Value
CREPA Creatinine, P 2160-0
EGFR2 Estimated GFR (eGFR) 98979-8