Test Details
Mnemonic
FRDIG
Ordering Code
3800080
CPT-4 Code(s)
80163
Specimen Information
Patient Preparation
Do not take biotin or any supplements containing biotin for 12 hours prior to testing.
Collect
Serum separator tube (SST)
Specimen Preparation
Collect blood 6 - 8 hours after last digoxin dose. Centrifuge within 2 hours of collection, remove from cells and send 1.0 mL serum refrigerated in a screw capped plastic vial.
Alternate Specimen
Serum: Red top
Minimum Volume
0.5 mL
Transport Temperature
Refrigerated
Stability
Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 180 days
Refrigerated: 7 days
Frozen: 180 days
Methodology
Ultrafiltration followed by Electrochemiluminescent Immunoassay
Reference Range
≥16 years 0.4 - 0.9 ng/mL
Toxic Concentration ≥3.0 ng/mL
Toxic Concentration ≥3.0 ng/mL
Performing Laboratory
Mayo Clinic Laboratories
New York DOH Approval Status
Yes