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

Methodology

Ultrafiltration followed by Electrochemiluminescent Immunoassay
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Reference Range

≥16 years 0.4 - 0.9 ng/mL
Toxic Concentration ≥3.0 ng/mL
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Performing Laboratory

MAYO
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New York DOH Approval Status

Yes
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