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Cystatin C, Serum with Reflex to Estimated Glomerular Filtration Rate (eGFR)
0095229
Ordering Recommendation

Calculate glomerular filtration rate in patients for whom serum creatinine may be misleading, such as the very obese, elderly, or malnourished patients.

Mnemonic
CYSTAT C
Methodology
Quantitative Nephelometry
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Serum separator tube or plasma separator tube. 
Specimen Preparation
Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.4 mL) 
Storage/Transport Temperature
Refrigerated. 
Unacceptable Conditions
Grossly hemolyzed specimens. 
Remarks
 
Stability
After separation from cells: Ambient: 48 hourS; Refrigerated: 1 week; Frozen: 2 months 
Reference Interval
Effective February 20, 2018
Test Number
Components
Reference Interval
 Cystatin C
AgeReference Interval
0-3 months0.8-2.3 mg/L
4-11 months0.7-1.5 mg/L
1-3 years0.5-1.3 mg/L
4-8 years0.5-1.3 mg/L
9-17 years0.5-1.3 mg/L
18 years and older0.5-1.0 mg/L

 eGFR by Cystatin C
Age
Reference Interval
17 years of lessCalculation not reported
18 years and greaterStageDescriptioneGFR Range (mL/min/BSA)
1Normal or increased eGFR90 or greater
2Mildly decreased eGFR60 - 89
3Moderately decreased eGFR30 - 59
4Severely decreased eGFR15 - 29
5Kidney FailureLess than 15


Interpretive Data


Note
If the patient's age is either unknown or is 18 years or greater, then Cystatin C Reflex will be added at no extra charge.
Hotline History
View Hotline History
Components
Component Test Code*Component Chart NameLOINC
0095228Cystatin C33863-2
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases