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Test Name

14.3.3 eta Protein

CPT Code(s)

83520

Methodology

Enzyme Linked Immunosorbent Assay (ELISA)

Reference Range(s)

<0.2 ng/mL

Clinical Significance

The 14-3-3η protein appears to contribute to the pathologic process of joint erosion and, as such, is an emerging biomarker of joint damage in rheumatoid arthritis (RA) and psoriatic arthritis. Concentrations are significantly higher in people with active joint disease than in those with inactive RA or psoriasis without arthritis. Measurement of 14-3-3η complements RF and CCP antibody tests and may improve diagnostic sensitivity.

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Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.

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150690
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91455X
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150690
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14.3.3 eta Protein
91455