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Specimen Collection Manual and Test Catalog

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CYSTATIN C WITH EGFR

Geisinger Epic Procedure Code:  LAB1029    Geisinger Epic ID:  52041

SPECIMEN COLLECTION
Specimen type: 

Plasma or serum


Preferred collection container: 
Specimen required: 

2 mL serum or plasma; minimum 0.2 mL



SPECIMEN PROCESSING
Processing instructions: 

Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.


Transport temperature: 

Refrigerated (2-8°C) preferred or frozen


Specimen stability: 

Room temperature or refrigerated: 7 days. Frozen serum: 24 months. Frozen plasma: 6 months.


Rejection criteria: 

Stability limits exceeded



TEST DETAILS
Reference interval: 

18-49 years: 0.63-1.03 mg/L 
> or =50 years: 0.67-1.21 mg/L 
<18 years: Undefined


Additional information: 

Estimated Glomerular Filtration Rate (eGFR) is calculated based on 2012 CKD-EPI Cystatin C equation. EGFR Calculator | National Kidney Foundation. eGFR >=60 mL/min is considered normal in most case.


CPT code(s):  82610
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Test includes: 

Cystatin C with Estimated GFR


Methodology: 
Immunoturbidity
Synonyms: 

CysC


Clinical significance: 

Serum cystatin C is useful in the evaluation of kidney function. Unlike creatinine, it is independent from muscle mass and gender. An estimated glomerular filtration rate (eGFR) will accompany all serum or plasma cystatin C results.


Doctoral Director(s): 
Hoi-Ying Elsie Yu PhD, DABCC, FADLM
Review Date:  12/27/2024

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