Cystatin C
Order Name
CYSTATIN C
Test Number: 3623775
Revision Date 10/29/2025
Test Number: 3623775
Revision Date 10/29/2025
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Cystatin C
|
Turbidometric | 33863-2 |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 1 mL (0.5 mL) | Serum | Clot Activator SST | Refrigerated |
| Alternate 1 | 1 mL (0.5 mL) | Plasma | Sodium Heparin (Green Top / No-Gel) | Refrigerated |
| Instructions | Dietary Instructions: Overnight fasting is preferred. Collect blood in SST Clot tube or Sodium Heparin Green-top tube. Allow Serum to clot for 15 minutes. Centrifuge aliquot Serum or Plasma for 10min and separate wihtin 2 hours and keep refrigerated. Specimen Stability: Room temperature: 24 Hours, Refrigerated: 7 Days, Frozen: 90 Days. |
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| GENERAL INFORMATION | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Testing Schedule | Mon-Fri | ||||||||
| Expected TAT | 3-4 Days | ||||||||
| Clinical Use | Cystatin C is a highly sensitive and specific marker of glomerular filtration rate (renal function). Cystatin C is independent of muscle mass, age, and body mass index. Cystatin C is also used to assess renal allograft function. | ||||||||
| Notes | This test will order and result a Cystatin C Estimated GFR as shown below.
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| CPT Code(s) | 82610 | ||||||||
| Service Provided By |  |
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| Lab Section | Immunology - Serology | ||||||||