Sign in →

Test Code LAB477 Levetiracetam, Serum

Additional Codes

Mayo Test Code: LEVE

Reporting Name

Levetiracetam, S

Useful For

Monitoring serum concentration of levetiracetam, particularly in patients with renal disease


Assessing compliance


Assessing potential toxicity

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Specimen Required


Preferred: Red top

Acceptable: Serum gel

Specimen Volume: 1 mL

Collection Instructions:

1. Draw blood immediately before next scheduled dose.

2. For sustained-release formulations ONLY, draw blood a minimum of 12 hours after last dose.

3. Spin down within 2 hours of draw.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 28 days
  Ambient  28 days
  Frozen  28 days

Reject Due To


Mild OK; Gross OK


Mild OK; Gross OK


Mild OK; Gross OK



Reference Values

12.0-46.0 mcg/mL

Day(s) and Time(s) Performed

Monday through Friday; 2 p.m., Satuday; 1 p.m., Sunday; 11 a.m.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
LEVE Levetiracetam, S 30471-7


Result ID Test Result Name Result LOINC Value
83140 Levetiracetam, S 30471-7

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.


If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

Neurology Specialty Testing Client Test Request (T732) (

General Request Form (T239) (