Ethosuximide, Serum

Test Code
7443


CPT Codes
80168

Preferred Specimen
"Serum or plasma
"


Minimum Volume
"0.6 mL
"


Instructions
"Refrigerate
Transfer separated serum or plasma to a plastic transport tube. Oral: peak: two to four hours after dose; trough: immediately prior to next dose. Peak or trough levels may be used to monitor therapy because blood levels are fairly constant.State other drugs taken by patient.

"


Transport Container
"Red-top tube, lavender-top (EDTA) tube, or green-top (heparin) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decr


Specimen Stability
"Room temperature 14 days
Refrigerated 14 days
Frozen 14 days
Freeze/thaw cycles Stable x3
"


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
"Gel-barrier tube; hemolysis; lipemia; gross bacterial contamination
"


Methodology
" Immunoassay "

Reference Range
"Therapeutic: 40-100 µg/mL
Potentially toxic: >100 µg/mL
"




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.