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Test Code Cystatin C Cystatin C Level

Clinical System Name

Cystatin C Level


None specified

Sample Requirements

Specimen: Whole blood

Container(s):  Gold SST,  Red, Lt green Lithium heparin, dark green sodium heparin, Lavendar EDTA or Gold Microtainer

Preferred Vol: 2 mL

Minimum Vol:  1.0 mL



Processing Instructions

Reject due to: Grossly hemolyzed

Spin: Y

Aliquot: Y

Temp: 2 - 4 C

Storage location:  Separate serum or plasma from cells within 2 hours of collection.

CPA refrigerator, FrigA rack. 1mL serum/plasma should be removed from separator for storage.


Off-site collection: Separate serum or plasma from cells within 2 hours of collection. Ship refrigerated.


Specimen Type Temperature Time
Serum or plasma on gel separator or separated Room temp

48 h

serum or plasma separated Refrigerated 1 w

2 m



STAT Performed TAT
N  M, W, F, day shift 1 - 3 d


Performing Laboratory

Seattle Children's Laboratory


Department:  Chemistry

Location:  Chem East

Phone Number: (206) 987-2617



Reference Range



Age mg/L
0 - 3 months 0.8 - 2.3
4 - 11 months 0.7 - 1.5
1 - 17 years 0.5 - 1.3
18 years and older 0.5 - 1.0



Method: Nephelometry

Analytical Volume: 0.5 mL

Limitations: Test is affected by gross lipemia, not affected by hemolysis or icterus.

CPT Codes