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HelpCystatin C with Estimated Glomerular Filtration Rate (eGFR), Serum
Additional Codes
LAB3050
Specimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions:
1. Serum gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged and serum aliquoted into a plastic vial within 2 hours of collection.
Specimen Type
SerumSpecimen Minimum Volume
0.25 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 14 days | |
| Frozen | 30 days | ||
| Ambient | 7 days |
Reference Values
CYSTATIN C:
18-49 years: 0.63-1.03 mg/L
≥50 years: 0.67-1.21 mg/L
0-17 years: Reference values have not been established. Refer to estimated glomerular filtration rate (eGFR).
ESTIMATED GFR:
>60 mL/min/BSA (body surface area)
Adult eGFR: Estimated GFR calculated using CKD-EPI Cystatin C equation.(1)
Pediatric eGFR: Estimated GFR calculated using Schwartz Cystatin C equation.(12)
Day(s) Performed
Report Available
Same day/1 to 3 daysSpecimen Retention Time
7 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82610
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CSTCE | Cystatin C with Estimated GFR, S | 87430-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| GFRC | eGFR by Cystatin C | 50210-4 |
| CSTNC | Cystatin C, S | 33863-2 |
Forms
If not ordering electronically, complete, print, and send one of the following forms with the specimen:
-General Test Request (T239)
-Cardiovascular Test Request Form (T724)
-Renal Diagnostics Test Request (T830)