Days Set Up
Daily, 24 hours
Analytic Time

2 hours

MiChart Code
Soft Order Code

Test Updated:


GFR (Glomerular Filtration Rate)
Glomerular Filtration Rate (GFR)

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Find a Requisition

All specimens should be accompanied by a requisition.

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MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

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Test Overview

Test Methodology

Colorimetic Rate

Test Usage

Evaluation of renal function

Reference Range

1-4 years: 0.2 - 0.6 mg/dL, 5-11 years: 0.4 - 0.9 mg/dL, 12-150 years, male: 0.7 - 1.3 mg/dL, female: 0.5 - 1.0 mg/dL
? 60 mL/min/1.732
The CKD-EPI equation should not be used to predict EGFR in unstable patients or in children. A GFR estimate between 15 and 59 for ? 3 months is classified as Chronic Kidney Disease (Stage 3 or 4).
GFR estimate can be interpreted accurately only during a steady state of creatinine balance. GFR estimate will overestimate true GFR if serum creatinine is rising (such as acute kidney failure) and will underestimate true GFR if serum creatinine is declining (such as resolution of acute kidney failure).
EGFR is not calculated when serum creatinine values are <0.1mg/dL.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Onsite

Collect specimen in an SST tube.

Collection Offsite

Collect specimen in an SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate.

Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum

Billing Information

CPT Code
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.