Laboratory Test Detail

Last Updated: June 5, 2023 @ 9:13 am


Creatinine with GFR

  • One SST

Also Acceptable:
  • One Green Top (Li Heparin)
  • One Green Top (Na Heparin)
  • One Red Top
  • 1 mL (Min:0.5 mL) Serum . Submit Refrigerated. Submit in a Standard Transport Tube.

Also Acceptable:
  • 1 mL (Min:0.5 mL) Plasma . Submit Refrigerated. Submit in a Standard Transport Tube.
Special Handling:
  • Separate from cells ASAP
  • GFR is a calculation
    Can add to a previous Serum Creatinine Result.
    To estimate the glomerular filtration rate for African Americans, multiply the result provided by 1.21
Rejection Criteria:
  • Hemolyzed specimens
Stability:Ambient: 8 Hour(s); Refrigerated: 7 Day(s); Frozen: 1 Month(s); Incubated: Unacceptable
Reported:1-3 Day(s)
CPT Codes:
  • 82565
Interpretive Data:Please see report for interpretive data.

ESTIMATED GFR Reference Range:
GFR = Greater than or equal to 90: Kidney damage with normal or increased GFR.
GFR = 60-89: Kidney damage with mild decreased GFR.
GFR = 30-59: Moderate decreased GFR.
GFR = 15-29: Severe decreased GFR.
GFR = Less than 15: Kidney Failure.

GFR = Less than 60: Chronic Kidney Disease, if found over a 3 month period.
For African Americans, multiply the calculated GFR by 1.21.
GFR calculation is not valid for patients under age 18 years.
For patients over age 70 please interpret results with caution as results have not been validated for this calculation method.

Please Note: Estimated GFR reference range change as of 10/18/2021.
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