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LabCorp and Quest are both open and taking extra precautions to service Walk-In Lab customers. 

In the near future Walk-In Lab will be providing Quest COVID-19 Antibody testing.  Learn more.

Rheumatoid Arthritis

Rheumatoid arthritis is an autoimmune disease that causes the body’s immune system to inadvertently attack the joints. This causes inflammation which leads to swelling and pain in and around the joints. Generally, Rheumatoid arthritis affects the joints of the hands, feet, wrists, elbows, knees, and ankles. Common tests used for diagnosis are the Rheumatoid factor test, the Cyclic Citrullinated Peptide (CCP) Antibody Blood Test, IgG and IgA, and the Antinuclear antibody test. Thank you for browsing our selection of Rheumatoid Arthritis blood tests and panels. Shop additional Autoimmune Tests confidentially and order online without insurance or a doctor's note.

Choose One Lab: LABCORP (LC) or QUEST (QD) or ALL

Walk-In Lab is contracted with LabCorp (LC) and Quest Diagnostics (QD) for routine lab testing. Please choose LC or QD to complete your order. If you prefer to receive a kit by mail for specimen collection, please see our Home Test Kits. LC and QD tests must be ordered separately.

LabCorp: Online lab testing is prohibited in MA, MD, NY, NJ and RI.

Quest Diagnostics: Online lab testing is prohibited in NY, NJ and RI.

  • Complement C4 Blood Test

    May Special: Save 10% with coupon code MAYSALE. This Complement C4 Blood Test measures the amount of Complement C4 protein in your blood. These proteins are part of your complement system, an important part of your immune system that helps kill bacteria and viruses causing disease.
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  • Centromere B Antibody Blood Test

    May Special: Save 10% with coupon code MAYSALE. A Centromere B Antibody Blood Test is useful in the evaluation of patients with the form of scleroderma known as CREST. 
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  • Interleukin-6 Blood Test

    May Special: Save 10% with coupon code MAYSALE. An Interleukin-6 Blood Test test is used to measure the amount of IL-6 in the blood.
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  • Rheumatoid Factor (RA) Blood Test

    May Special: Save 10% with coupon code MAYSALE. The RA Blood Test helps in the differential diagnosis and prognosis of arthritic disorders.  
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  • Immunoglobulin E Blood Test, Total, IgE

    May Special: Save 10% with coupon code MAYSALE. Immunoglobulin E is a blood test used to evaluate immunoglobulin status in possible atopic disease.
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  • Immunoglobulin A (IgA) Blood Test, Quantitative

    May Special: Save 10% with coupon code MAYSALE. An Immunoglobulin A (IgA) Blood Test is a quantitation of IgA, the chief antibody in the mucous membranes of the gastrointestinal and respiratory tract and in saliva and tears.
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  • C-Reactive Protein (CRP) Blood Test, Quantitative

    May Special: Save 10% with coupon code MAYSALE. The CRP Test determines whether a high or increasing amount of CRP in your blood suggests an acute infection or inflammation.
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  • Complement C3 Blood Test

    May Special: Save 10% with coupon code MAYSALE. A Complement C3 Blood Test is used to determine whether deficiencies or abnormalities in the proteins that are part of the complement system are contributing to increased infections or increased autoimmune activity; and to monitor the activity of autoimmune diseases.
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  • Antinuclear Antibodies IFA (ANA-IFA) Blood Test

    May Special: Save 10% with coupon code MAYSALE. An ANA-IFA Blood Test is used as a primary test to help evaluate a person for autoimmune disorders that affect many tissues and organs throughout the body.
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  • Cyclic Citrullinated Peptide (CCP) Antibody Blood Te...

    May Special: Save 10% with coupon code MAYSALE. A CCP Antibody Blood Test is used as an aid in the diagnosis of rheumatoid arthritis (RA).
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  • Chromatin (Nucleosomal) Antibody Blood Test

    May Special: Save 10% with coupon code MAYSALE. The Chromatin (Nucleosomal) Antibody Blood Test is useful in diagnosing SLE (systemic lupus erythmatosis). 
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