« Find Another Test Test Overview Test Methodology Radioimmunoassay (RIA) Reference Range* 0 - 2830 ng/mL * Reference ranges may change over time. Please refer to the original patient report when evaluating results. Test Details Days Test Performed 1st and 3rd Thursday of the month Analytic Time 21-44 days Soft Order Code FC4A MiChart Code C4ades Arg Level (Sendout) Test Updated Update Type: CPT Code Change Updated Date: 04/15/2020 Synonyms Synonyms C4ades Arg Level + See More Laboratory Sendout Laboratory Reference Mayo FC4A (57800) (National Jewish Health C4AL) Looking to Order a Test? We’ve provided helpful links to make ordering easy. Find a Requisition All specimens should be accompanied by a requisition. Submitting Specimens Learn about how to properly label and where to ship specimens. Order Kits and Supplies MLabs provides all the supplies necessary for the collection of specimens. Test FAQ Visit our provider FAQ and learn about common questions to ordering tests. Specimen Requirements Special Handing Must arrive in lab or aliquot and freeze within 30 minutes. Container Normal Volume 1 mL EDTA plasma Minimum Volume 0.5 mL EDTA plasma Additional Information Test sent to Mayo Medical Laboratories; performed by National Jewish Health. Billing Information Fee Codes CPT Code 86160 Have More Billing Questions? Explore our helpful billing resources: Billing Resources Billing FAQ
