Biomarker Lens

Common biomarkers

  • Hemoglobin
  • Glucose
  • ALT
  • Apolipoprotein B
  • C-Reactive Protein, Cardiac
  • Ferritin
  • Alb/Creat Ratio, Urine
  • Alkaline Phosphatase
  • FSH
  • T4,Free(Direct)

Biomarkers · Chemical

Cystatin C

Primary unit
mg/L
LOINC codes
33863-2
Tests that measure Cystatin C
Labcorp 4, Quest Diagnostics 2

Choose the right version

  • eGFR Creat-Cyst CAlternative test

    Cystatin C offers an alternative basis for eGFR because muscle size, age and diet do not affect it, unlike creatinine.

  • CreatinineAlternative test

    Clinicians may estimate GFR with cystatin C alone or with creatinine, which strengthens its link with risks of death and end stage renal disease.

Each statement links to the source we wrote it from.

Tests

Check the catalog code, specimen, method and preparation for every test that measures Cystatin C. Select up to five tests to compare them side by side.

Labcorp 4 tests

Panels that include this biomarker

  • Cystatin C With Glomerular Filtration Rate, Estimated (eGFR) 121265

    2 analytes · Serum · Fasting not stated · Turnaround 2 - 5 days

    Method and collection
    Method
    Turbidimetric (directly traceable to ERM-DA471/IFCC, the international standard reference material)
    Preparation
    Overnight fasting is preferred.
    Collection
    If green-top (heparin) tube is used, separate plasma from red blood cells and transfer plasma to a transfer tube.
    Labcorp catalog page

  • eGFR Creatinine-Cystatin C Calculation 121022

    3 analytes · Serum · Fasting not stated · Turnaround 2 - 5 days

    Method and collection
    Method
    Creatinine: Kinetic Jaffe Cystatin C: Turbidimetric (directly traceable to ERM-DA471/IFCC, the international standard reference material)
    Collection
    If green-top (heparin) tube is used, separate plasma from red blood cells and transfer plasma to a transfer tube.
    Labcorp catalog page

  • eGFR Creatinine-Cystatin C Calculation With Albumin:Creatinine Ratio, Urine 121054

    6 analytes · Serum · Fasting not stated · Turnaround 2 - 5 days

    Method and collection
    Method
    Creatinine: Kinetic Jaffe Cystatin C: Turbidimetric (directly traceable to ERM-DA471/IFCC, the international standard reference material) Albumin: Immunoturbidimetric
    Collection
    If green-top (heparin) tube is used, separate plasma from red blood cells and transfer plasma to a transfer tube. Collect random urine without preservatives. pH must be 4-8.
    Labcorp catalog page

  • eGFR Creatinine-Cystatin C Calculation With Albumin:Creatinine-Protein:Creatinine Ratios, Urine 121065

    8 analytes · Serum · Fasting not stated · Turnaround 2 - 5 days

    Method and collection
    Method
    Creatinine: Kinetic Jaffe Cystatin C: Turbidimetric (directly traceable to ERM-DA471/IFCC, the international standard reference material) Albumin: Immunoturbidimetric Protein and Creatinine, Random Urine: Spectrophotometric
    Collection
    If green-top (heparin) tube is used, separate plasma from red blood cells and transfer plasma to a transfer tube. Collect random urine without preservatives. pH must be 4-8.
    Labcorp catalog page

Quest Diagnostics 2 tests

Panels that include this biomarker

  • Cystatin C with Glomerular Filtration Rate, Estimated (eGFR) 94588

    2 analytes · Serum · Fasting not stated

    Method and collection
    Method
    Particle Enhanced Turbidimetric Immunoassay (PETIA)
    Reference notes
    See Laboratory Report
    Quest Diagnostics catalog page

  • Estimated Glomerular Filtration Rate (eGFR) with Creatinine and Cystatin C 13581

    3 analytes · Serum · Fasting not stated

    Method and collection
    Method
    Spectrophotometry (SP) • Particle Enhanced Turbidimetric Immunoassay (PETIA)
    Reference notes
    See Laboratory report
    Quest Diagnostics catalog page

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Sources

Check the guidelines, studies and lab catalogs behind every range and link on this page. Open a source to see each claim it backs.

Studies

Lab catalogs

Reference sources

Codes and registries

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

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