Cystatin C Test Cost: Compare 4 Prices
How much does the Cystatin C cost? We found 4 posted prices from 4 sellers, from $42.99 to $249 including separately listed fees. The cheapest cystatin C test price open to the public was $42.99 at TestWell. Last checked Oct 20, 2026.
What it measures
Cystatin C in blood, used with creatinine to estimate kidney function (eGFR).
Lab: Quest or Labcorp (varies by seller) · Specimen: Blood draw at a patient service center
Evidence level: Established
Scope: Established for the KDIGO-defined situational use (confirming/refining eGFR).
The KDIGO 2024 chronic kidney disease guideline recommends a combined creatinine–cystatin C eGFR (eGFRcr-cys) in clinical situations when the creatinine-based estimate is less accurate and GFR affects clinical decisions (1C), for example in people with unusually high or low muscle mass. It recommends serum creatinine with an estimating equation for the initial GFR assessment, so cystatin C is a second-line, situational test rather than a routine first test.
Sources:
- KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney Int. 2024;105(4S):S117-S314. https://kdigo.org/wp-content/uploads/2024/03/KDIGO-2024-CKD-Guideline.pdf
Tiers: Established · Widely used, with known limits · Emerging · Not validated · Not yet reviewed. We publish a tier only when we can cite a guideline, systematic review or major professional-society statement. This summary describes published literature and is not a recommendation to take or skip any test.
Cystatin C Test prices, lowest total first
| Seller | Price | Listed fees | Total | Who can order | Notes | Links and actions |
|---|---|---|---|---|---|---|
| TestWellLOWESTSAVED Cystatin C (with eGFR) | $36.99 | $6 lab processing fee (per order) | $42.99 | Self-order | Quest or Labcorp. | View |
| Direct Laboratory Services (DirectLabs)SAVED Cystatin C with eGFR | $104 | $0 listed | $104 | Self-order | Quest Diagnostics draw. Price = DirectLabs catalog 'Reg Price' (DL_Price field of the store's public catalog API); the testinfo page does not display price. | View |
| Walk-In LabSAVED Cystatin C with eGFR Blood Test | $105 | $6 physician fee (per order) | $111 | Self-order | Page says the eGFR version is offered by 'the other lab'; lab not confirmed. | View |
| True Health LabsSAVED Cystatin C | $249 | $0 listed | $249 | Self-order | Quest. Product page says price includes the patient service center draw; Quest self-order not available in NY, NJ, MA, RI. (price read manually; site blocks automated checks) | View |
Totals add only fees each seller lists on its product page (e.g., physician-authorization fees). Shipping, blood-draw, sales tax and state availability may vary. Links may become affiliate links in future; see our disclosure.
Cystatin C Test FAQ
How much does a cystatin C test cost?
On Oct 20, 2026, 4 posted prices from 4 sellers ranged from $42.99 to $249 including listed fees (median $108). The lowest price open to the public was $42.99 at TestWell.
What's included in the cystatin C test price?
Each row is the seller's listing for the Cystatin C (lab: Quest or Labcorp (varies by seller); specimen: Blood draw at a patient service center). The Total column adds fees the seller lists on the product page: TestWell ($6 lab processing fee (per order)), Walk-In Lab ($6 physician fee (per order)). Shipping, tax, blood draws and consultations are not included unless the row says so.
Do you need a doctor's order for a cystatin C test?
Usually not. 4 of 4 listings here are marked self-order: you can buy without bringing your own doctor's order. Some add a listed physician or handling fee, included in the Total. Check the 'Who can order' column.
Which states restrict ordering a cystatin C test?
Sellers in our table note these limits: True Health Labs: Quest self-order not available in NY, NJ, MA, RI. State rules for consumer-ordered lab tests vary and sellers may block some states at checkout, so confirm on the seller's page.
Can I use an HSA or FSA to pay?
The IRS counts "laboratory fees that are part of medical care" as medical expenses (IRS Publication 502), and defines medical care as the diagnosis, cure, mitigation, treatment or prevention of disease. Whether a particular at-home test qualifies depends on that and on your plan's rules, so check with your HSA or FSA administrator before paying.
Why do prices differ so much?
Sellers set their own prices for the same lab's kit and may bundle practitioner authorization, consultations, shipping or add-ons. The table shows the price and any separately listed fees as posted on each seller's public page on the date checked.
How current are these prices?
All prices were checked on Oct 20, 2026. Prices and availability (including state restrictions) change; confirm on the seller's page before ordering.
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