Book Cystatin C Test in Navi Mumbai

The Cystatin C test is a blood test that measures the level of Cystatin C, a small protein produced at a constant rate by all nucleated cells in the body and filtered freely by the kidneys. Unlike creatinine, the conventional marker of kidney function, Cystatin C production is not influenced by muscle mass, age, gender, or dietary protein intake, making it a significantly more reliable and unbiased indicator of glomerular filtration rate across diverse patient populations. The kidneys filter Cystatin C entirely through the glomeruli, after which it is reabsorbed and broken down in the renal tubules without being secreted back into the bloodstream. This means that when kidney filtration capacity declines, Cystatin C accumulates in the blood in direct proportion to the degree of renal impairment. This property makes it particularly valuable for detecting early and mild reductions in kidney function that creatinine-based tests frequently miss, especially in elderly patients, women, and individuals with low muscle mass who may have a falsely normal creatinine despite significant kidney dysfunction. In India, chronic kidney disease affects an estimated 17 percent of the adult population, with diabetes and hypertension as the leading causes. Cystatin C offers an important advantage in this context by enabling earlier detection and more accurate monitoring of kidney function decline. The test is performed on a small blood sample drawn from a vein and completed in under five minutes.

Doctors prescribe a Cystatin C test in the following situations: Detecting early chronic kidney disease in patients where creatinine levels remain within the normal range despite meaningful reductions in glomerular filtration rate, as Cystatin C rises earlier and more sensitively, enabling timely nephrology referral and intervention before irreversible kidney damage progresses. Evaluating kidney function in elderly patients and individuals with low muscle mass, including those with malnutrition or chronic illness, where creatinine-based eGFR calculations are known to overestimate true kidney function and Cystatin C provides a more accurate and clinically reliable alternative. Monitoring kidney function in patients with diabetes and hypertension where progressive nephropathy is a major long-term complication and early detection of declining filtration rate allows optimisation of blood pressure control, medication adjustment, and renoprotective therapy. Assessing kidney function before initiating nephrotoxic medications including NSAIDs, certain antibiotics, contrast agents, and chemotherapy drugs where accurate baseline GFR estimation is essential to determine safe dosing and minimise the risk of drug-induced kidney injury. Investigating cardiovascular risk in patients with heart failure and coronary artery disease where elevated Cystatin C is an independent predictor of adverse cardiovascular outcomes and provides prognostic information beyond standard kidney function markers. Monitoring kidney transplant recipients where Cystatin C offers a more sensitive and timely indicator of graft function changes compared to creatinine, enabling earlier detection of rejection episodes or transplant nephropathy.

The Cystatin C test measures the concentration of Cystatin C protein in the blood, expressed in milligrams per litre (mg/L). The normal reference range for adults is 0.62 to 1.15 mg/L, with values slightly higher in elderly individuals reflecting the natural age-related decline in glomerular filtration rate. Normal (0.62 to 1.15 mg/L) A result within this range indicates that kidney filtration is functioning adequately. In patients being monitored for kidney disease risk, a normal Cystatin C is reassuring, though annual retesting is recommended for individuals with diabetes, hypertension, or a family history of kidney disease. Mildly Elevated (1.16 to 1.50 mg/L) A mildly elevated result suggests early to moderate reduction in glomerular filtration rate. This range warrants clinical review, optimisation of blood pressure and blood sugar control, and closer monitoring of kidney function with repeat testing at intervals recommended by your physician. Markedly Elevated (Above 1.50 mg/L) Markedly elevated Cystatin C indicates significant impairment of kidney filtration function, consistent with moderate to severe chronic kidney disease. Results in this range require prompt nephrology evaluation, detailed assessment of kidney disease staging, and consideration of renoprotective or renal replacement therapy planning.

No fasting is required for the Cystatin C test, as food intake does not significantly affect Cystatin C concentrations in the blood. However, since this test is frequently ordered alongside a complete kidney function panel including creatinine, urea, and electrolytes, fasting for 8 hours before collection is generally advisable to ensure accuracy of all co-ordered tests. Corticosteroid medications are known to increase Cystatin C levels independently of kidney function, and thyroid disorders can also influence results, with hypothyroidism causing elevation and hyperthyroidism causing reduction. It is important to inform your doctor about all medications, supplements, and any known thyroid conditions before the test to ensure accurate interpretation. Staying well hydrated before sample collection facilitates easier venous access. If you are undergoing serial Cystatin C measurements to monitor kidney disease progression, using the same laboratory and assay platform across tests ensures consistent and comparable results over time.

If you are booking through the SecondMedic platform the Cystatin C test price in Navi Mumbai can cost you around Rs. 561. You may also consider booking a comprehensive kidney function panel that includes Cystatin C alongside creatinine, urea, uric acid, and electrolytes for a more complete assessment of renal health at a bundled price on SecondMedic.

SecondMedic offers convenient home sample collection for the Cystatin C test in Navi Mumbai, making it easy to get tested without visiting a diagnostic centre. Home collection is available free of charge for orders above Rs. 300. A trained phlebotomist will visit your preferred address between 7 AM and 10 PM, seven days a week, including Sundays and public holidays. Your blood sample is processed at NABL-accredited partner laboratories, and your report is delivered within 24 hours directly to your WhatsApp and email.