Test Overview
Test Methodology

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

Reference Range *

Hydrocodone, unconjugated: 10 - 100 ng/mL; Hydromorphone, unconjugated: 1 - 30 ng/mL when used as sole therapy; Dihydrocodeine, 72-150 ng/mL when used as sole therapy.
Norhydrocodone: Metabolite of hydrocodone

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Wednesday
Analytic Time

5 - 11 days

Soft Order Code
HYDCS
Synonyms
  • Hydromorphone, Serum
  • Dilaudid
  • Dihydrocodeine, Serum
Laboratory
Sendout
Reference Laboratory
Mayo HYDCS
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect a trough specimen in a red top tube; do not use SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate.

Normal Volume

1 mL serum

Minimum Volume

1 mL serum

Rejection Criteria
SST or PST tube not acceptable.
Additional Information

Test performed by Mayo Medical Laboratories

Billing
CPT Code
G0480
Fee Code
AB221
NY State Approved
No