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

Rheumatoid Factor IgM

Also listed as
Rheumatoid Factor (IgM), RF, IgM by EIA, RDL
Primary unit
U
LOINC codes
11573-3, 9338-5
Tests that measure Rheumatoid Factor IgM
Labcorp 2, Quest Diagnostics 2

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Quest Diagnostics, Rheumatoid Factor (IgM) 17743

PopulationInterval
≤6 Negative≤6 Negative
>6 Positive>6 Positive

Quest Diagnostics test catalog, 17743

Tests

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

Labcorp 2 tests

Single-analyte tests

  • Rheumatoid Factor, IgM by EIA (RDL) 520097

    Serum · Fasting not stated · Turnaround 5 - 7 days

    Method and collection
    Method
    Enzyme-linked immunosorbent assay (ELISA)
    Collection
    Separate serum from cells within one hour of collection. Transfer to a plastic transport tube before shipping. To avoid delays in turnaround time when requesting multiple tests on frozen samples , please submit separate frozen specimens for each test requested.
    Labcorp catalog page

Panels that include this biomarker

  • Rheumatoid Factor Isotypes, IgG, IgA, and IgM by EIA (RDL) 520178

    3 analytes · Serum · Fasting not stated · Turnaround 14 - 21 days

    Method and collection
    Method
    Enzyme-linked immunosorbent assay (ELISA)
    Collection
    Separate serum from cells within one hour of collection. Transfer to a plastic transport tube before shipping.
    Labcorp catalog page

Quest Diagnostics 2 tests

Single-analyte tests

  • Rheumatoid Factor (IgM) 17743

    Serum · Fasting not stated · Turnaround Set up: Tues

    Method and collection
    Method
    Immunoassay (IA)
    Preparation
    Overnight fasting is preferred
    Quest Diagnostics catalog page

Panels that include this biomarker

  • Rheumatoid Arthritis Diagnostic Panel 3 19878

    6 analytes · Serum · Fasting not stated

    Method and collection
    Method
    Immunoassay (IA)
    Preparation
    Overnight fasting is preferred
    Reference notes
    Rheumatoid Factor (IgA) ≤6 Negative >6 Positive Rheumatoid Factor (IgG) ≤6 Negative >6 Positive Rheumatoid Factor (IgM) ≤6 Negative >6 Positive CCP Antibody (IgG) <20 Negative 20-39 Weak positive 40-59 Moderate Positive >59 Strong positive Sjogren's Antibody (SS-A) <1.0 Negative Sjogren's Antibody (SS-B) <1.0 Negative
    Quest Diagnostics catalog page

0 of 5 tests selected

Pick one more

Sources

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.

Interpret your own results with a licensed clinician, or track your lab history and health goals in Aumnivida.

Spotted an error? Email hello@biomarkerlens.com with the page URL and the primary source that corrects the entry.