Cystatin C can vary due to many factors like hydration, minor infections, or lab variation. One isolated value does not confirm
kidney disease. Please do a serum
creatinine and eGFR, Check urine routine (for protein/RBC) Repeat test after 2–3 weeks. If all these are normal, you can consider it clinically insignificant.
Next Steps
Better to have a direct Consultant with a Nephrologist.