Specimen:
Collect
- One SST
- Timed Urine in Timed Urine Container
Also Acceptable:
- One Red Top
Submit
- 1 mL (Min:0.5 mL) Serum . Submit Refrigerated. Submit in a Standard Transport Tube.
- 10 mL (Min:5 mL) Aliquot(s) Timed Urine in Sterile Specimen Container. Submit Refrigerated.
Special Handling
- 24 HR Urine Collection Preferred
- Keep Specimen Refrigerated During Collection
- State Height
- State Volume
- State Weight
- State number of hours of collection.
Rejection Criteria
- Serum specimen must be collected within 24 hours of urine collection start or finish.
Stability
Ambient: 8 Hour(s); Refrigerated: 6 Day(s); Frozen: 1 Month(s); Incubated: Unacceptable
Methodology
- Colorimetric
- Kinetic
Performed
Mon-Fri
Reported
1-3 Day(s)
CPT Codes
- 82575
Interpretive Data
Please see report for interpretive data.
ESTIMATED GFR Reference Range:
GFR = Greater than or equal to 90: Normal or increased GFR.
GFR = 60-89: Mild decreased GFR
GFR = 30-59: Moderate decreased GFR.
GFR = 15-29: Severe decreased GFR.
GFR = Less than 15: Kidney Failure.
When found over a three month period, GFR less than 60 indicates Chronic Kidney Disease.
GFR calculation is not valid for patients under age 18 years.
Please note: the equation for eGFR calculation has been updated to the 2021 CKD-EPI Creatinine equation as recommended by the National Kidney Foundation and Association for Diagnostics and Laboratory Medicine.
ESTIMATED GFR Reference Range:
GFR = Greater than or equal to 90: Normal or increased GFR.
GFR = 60-89: Mild decreased GFR
GFR = 30-59: Moderate decreased GFR.
GFR = 15-29: Severe decreased GFR.
GFR = Less than 15: Kidney Failure.
When found over a three month period, GFR less than 60 indicates Chronic Kidney Disease.
GFR calculation is not valid for patients under age 18 years.
Please note: the equation for eGFR calculation has been updated to the 2021 CKD-EPI Creatinine equation as recommended by the National Kidney Foundation and Association for Diagnostics and Laboratory Medicine.
Components
- 1069 - CREATININE, SERUM
- 1040 - GFR ESTIMATION
- 1111 - CREAT CLEAR
- 2490 - VOLUME (ML)
- 2491 - HRS OF COLLECTION
- 2498 - CREATININE, URINE
- 2499 - BODY SURFACE AREA
Last Updated: June 30, 2025 @ 5:18 pm
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