Inactivated/Replace Test
Effective Date
04/04/2024
Included in Report
Replacement Test
VENLA – “Venlafaxine and Metabolite Qnt” replaced by VENM – “Venlafaxine and Metabolite, Serum or Plasma”
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Inactivated Test Details
Mnemonic
VENLA
Ordering Code
3510990
CPT-4 Codes(s)
80299
Replacement Test Details
Mnemonic
VENM
Ordering Code
3600382
CPT-4 Codes(s)
80338 (Alt code: G0480)
Turnaround Time
3 - 10 days
Performed
Wednesday, Saturday
Legacy Code
VENM
Example Report
Specimen Information
Patient Preparation
Pre-dose (trough) draw - At steady state concentration.
Collect
Red top
Specimen Preparation
Centrifuge, separate serum from cells within 2 hours of collection and send 1.0 mL serum in a screw capped plastic vial.
Alternate Specimen
Plasma: Lavender EDTA
Minimum Volume
0.5 mL
Transport Temperature
Refrigerated
Rejection Criteria
Whole blood, Serum separator tube (SST), Light blue sodium citrate, or yellow (SPS or ACD
Solution).
Solution).
Stability
Room temperature: 14 days
Refrigerated: 14 days
Frozen: 14 days
Refrigerated: 14 days
Frozen: 14 days
Methodology
Quantitative Liquid Chromatography/Tandem Mass Spectrometry
Reference Range
Therapeutic range
(Venlafaxine and o-Desmethylvenlafaxine)
195-400 ng/mL
Toxic range
(Venlafaxine and o-Desmethylvenlafaxine)
>= 800 ng/mL
(Venlafaxine and o-Desmethylvenlafaxine)
195-400 ng/mL
Toxic range
(Venlafaxine and o-Desmethylvenlafaxine)
>= 800 ng/mL
Performing Laboratory
ARUP
New York DOH Approval Status
Yes