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Geisinger Medical Laboratories Test Catalog
CREATININE AND CYSTATIN C WITH EGFR |
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Geisinger Epic Procedure Code: LAB4943
Geisinger Epic ID: 186451
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SPECIMEN COLLECTION |
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Specimen type: |
Plasma or serum | |
Preferred collection container: |
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Specimen required: |
2 mL serum or plasma; minimum 0.5 mL | |
| SPECIMEN PROCESSING |
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Specimen 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: stable 7 days. Frozen serum stable 24 months for Cystatin C; 3 months for creatinine. Frozen plasma 6 months for Cystatin C, 3 months for creatinine. | |
Rejection criteria: |
Stability limits exceeded | |
TEST DETAILS |
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Reference interval: |
Cystatin C: 18-49 years: 0.63-1.03 mg/L > or =50 years: 0.67-1.21 mg/L <18 years: Undefined Creatinine: Less than 2 years: 0.1-0.4 mg/dL 2 years to <6 years: 0.2-0.5 mg/dL 6 years to <10 years: 0.3-0.6 mg/dL 10 years to <18 years: 0.4-1.0 mg/dL Females 18 years or older: 0.5-1.0 mg/dL Males 18 years or older: 0.6-1.2 mg/dL |
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Interpretation guide: |
Estimated Glomerular Filtration Rate (eGFR) is calculated based on 2012 CKD-EPI Cystatin C equation and 2021 CKD-EPI equations. EGFR Calculator | National Kidney Foundation) | |
CPT code(s): |
82610, 82565 | |
| 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, Creatinine | |
Methodology: |
Enzymatic Immunoturbidity |
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Synonyms: |
CysC, CREATB, Creatinine-S
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Clinical significance: |
Serum Cystatin C with Creatinine is useful in the evaluation of kidney function. An estimated glomerular filtration rate (eGFR) will accompany all serum or plasma Cystatin C, Creatinine results. | |
Doctoral Director(s:) |
Hoi-Ying Elsie Yu PhD, DABCC, FADLM | |
| Review Date: | 04/16/2024 | |