Coumadin [936Z]

Test Code

Quest Code

CPT Codes

Preferred Specimen
3 mL plasma collected in a sodium heparin (green-top) tube

Minimum Volume
1.2 mL

Other Acceptable Specimens
Plasma collected in an EDTA (lavender-top) tube • Serum

Specimen Stability
Room temperature: 72 hours
Refrigerated: 7 days
Frozen: 30 days

High Performance Liquid Chromatography (HPLC)

Setup Schedule
Set up: Tues, Thurs, Sat; Report available: 2-4 days

Report Available
2 to 4 Day(s)

Reference Range
   1.0-10.0 mcg/mL

Toxic range

     >10.0 mcg/mL
Detection limit



Performing Laboratory
Quest Diagnostics Nichols Institute Chantilly
14225 Newbrook Drive
Chantilly, VA 20153-0841

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.