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If you have additional questions regarding this test, please call: 415-353-1667

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Methadone screen, urine

Item Value
Test Update Information Effective June 22, 2016, methadone screening will be carried out in-house at Parnassus Chemistry. The cut-off for a positive result will remain 300 µg/L. There will be no change in the % of positive results within our patient population.
Approval req'd? No
Available Stat? Yes
Test code METHA
Test group Methadone
Performed by Parnassus Chemistry
In House Availability Test available 24 hours per day, 7 days a week.
Method Homogenous enzyme immunoassay (Beckman DxC 800) using G6PDH- labeling
Container type Urine cup
Amount to Collect See preferred volume
Sample type Random urine
Preferred volume 1 mL urine
Min. Volume 0.5 mL urine
Processing notes Refrigerate sample.

If methadone confirmation is requested, order Sunquest test code MEDCON (Quest test code 16918). Sample should be transported at room temperature.

Normal range Negative

Note: a negative result indicates that methadone is not present, or it is present at a concentration below the cut-off concentration of 300 µg/L.

Stability Refrigerated for 7 days, frozen at -20C 1 month.
Additional information A concentration of <300 µg/L is considered negative by this test. A positive result is ≥ 300 µg/L and indicates the presence of methadone. This immunoassay is only a screening test and is not definitive. It is only designed to detect the parent drug, methadone, and NOT the major methadone metabolites (EDDP, EMDP).

Results cannot be used for medico-legal purposes.

Positive results will NOT be automatically confirmed. If a confirmation is required, call the laboratory at 415 353 1667 within 7 days of sample collection to request to add-on a methadone confirmation (detects methadone and EDDP, the major metabolite; test code MEDCON).
CPT coding 80301
LOINC code 19550-3
Last Updated 6/21/2016 6:32:27 PM
Entry Number 656
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