All markers › Organs
Cystatin C (kidney)
A kidney filter marker less affected by muscle mass than creatinine. Useful for muscular people and older adults.
Dr. Sorrell's optimal rangeNot set in the Lab DecoderUse your lab's reference range and talk it over with your clinician.
Who includes it, and what it costs
| Provider | Included / price | Checked |
|---|---|---|
| Function Health | not listed | 2026-10-16 |
| Superpower | add-on | 2026-10-16 |
| Jinfiniti AgingSOS Cellular Essentials | — | — |
| Quest (questhealth.com) | — | — |
| Labcorp OnDemand | — | — |
| Walk-In Lab | $105 Cystatin C with eGFR Blood Test | 2026-10-16 |
| Ulta Lab Tests | — | — |
| Mito Health | — | — |
| Rythm Health | not listed | 2026-10-16 |
| SiPhox Health | — | — |
| Everlywell | — | — |
| LetsGetChecked | — | — |
Memberships (Function, Superpower) and Jinfiniti's panel cover many markers for one price. See the home page. Quest and Walk-In Lab add a physician fee of about $6 per order.