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Test Code Billings Clinic: 4039 Digoxin, Plasma or Serum

Performing Laboratory

Billings Clinic Laboratory: Chemistry

Useful For

Monitoring digoxin therapy

Methodology

Latex-enhanced immunoturbidimetric

Specimen Requirements

Submit only 1 of the following specimens:

Serum or plasma should be physically separated from cells as soon as possible with a maximum limit of two hours from the time of collection.

 

Plasma

  • Draw blood in a green-top (lithium heparin) tube(s) 5 to 6 hours after last dose.
  • Spin down and send 2.0 mL of heparinized plasma frozen.
  • Date and time of last dose and date and time of draw are required on request form

 

Serum

  • Draw blood in a plain, red-top tube(s) or a serum gel tube(s) 5 to 6 hours after last dose. 
  • Spin down and send 2.0 mL of serum frozen
  • Date and time of last dose and date and time of draw are required on request form for processing.

Storage/Stability

Specimen Type Temperature Time
Plasma Refrigerated (preferred) 7 days
  Frozen 6 months
  Ambient 8 hours

 

Reject Due To

  • Hemolysis

Reference Values

  • Therapeutic concentration:  0.80 - 2.00 ng/mL
  • Call-back toxic concentration value:  >2.00 ng/mL

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

80162 - Digoxin


LCD or NCD test. ICD-10 code is required for this test. When appropriate, obtain a properly executed ABN and submit the ABN with test order(s). See “Medical Necessity and Advanced Beneficiary Notice (ABN) Policy and Form” under “Resources” for a copy of a form and additional information.

LOINC Code Information

Reporting Name LOINC Code
Digoxin 10535-3