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Opioid Metabolism or Exposure Screening (Serum/Plasma)

Published: August 9, 2026Updated: August 16, 2026

This test may check for recent exposure to opioids, their active metabolites, or their ongoing presence in your blood.

Quick summary

Assesses opioid use or management through blood analysis.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
106716-4
Short code
WASAPRNOPIOIDINITIATEDORCONTINUED
Synonyms
—
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
cms-assessment
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

This test could involve measuring specific opioids (e.g., morphine, codeine) or their metabolites (e.g., morphine-6-glucuronide) in your blood. It may also assess other substances like benzodiazepines or other controlled substances if part of a broader screening.

Why It’s Ordered

Your healthcare provider may order this test to evaluate opioid initiation, continuation, or monitoring of opioid therapy. It could be part of a broader assessment for pain management, addiction screening, or to ensure safe dosing.

Common Uses in Clinical Practice

Commonly used in settings like pain clinics, addiction treatment programs, or when managing chronic pain to confirm opioid presence, assess metabolism, or detect potential misuse.

Specimen and Method Notes

Specimen: Blood (serum or plasma). Method: Likely an immunoassay (e.g., immunoassay or chemiluminescent immunoassay) to detect opioids or metabolites with high sensitivity.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Results help determine if opioids are being used as prescribed, identify potential misuse, or monitor for therapeutic levels. Abnormal results may prompt further evaluation, dose adjustments, or additional testing for substance use.

Short name

Opioid-related test

Frequently asked questions

Why might I need this test?
Your doctor may order this test if you’re starting opioid treatment, continuing it, or if there are concerns about opioid use, pain management, or addiction.
What do the results mean?
Results may indicate current opioid exposure, whether it aligns with expected therapeutic levels, or if there are signs of misuse. Your provider will interpret results in the context of your medical history and treatment plan.
How often will I need this test?
Frequency depends on your treatment plan—some patients may need it weekly, monthly, or as needed to monitor opioid levels or adjust therapy.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy