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Norfentanyl concentration (serum/plasma)

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

This test measures the amount of norfentanyl, a synthetic opioid, in your blood. Norfentanyl is used in some pain management treatments and can be detected in serum or plasma.

Quick summary

["Norfentanyl levels help assess exposure to this opioid, especially in cases of overdose or treatment monitoring."]

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

Key facts at a glance

LOINC
95797-7
Short code
Norfentanyl Ur Ql Scn
Synonyms
Norfentanyl Ur Ql Scn
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
screen
CPT
86430
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you’re taking norfentanyl medication, experiencing suspected opioid poisoning, or if there’s concern about drug interactions or side effects. It can also be used in forensic or legal investigations involving opioid exposure.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into a vein (venipuncture) to draw blood, or if testing urine, you’ll provide a urine sample. Avoid alcohol or certain medications that might affect results for 24 hours before testing.

How the Test Works

Blood or urine is collected and analyzed using a sensitive laboratory method (likely immunoassay or mass spectrometry) to detect norfentanyl’s presence and measure its concentration.

What the Results Mean

Results are typically reported as a concentration value (e.g., micrograms per liter). High levels may indicate recent use, overdose, or improper dosing, while low or undetectable levels suggest no recent exposure.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Norfentanyl Level

Frequently asked questions

What does a high norfentanyl level indicate?
A high level may signal recent opioid ingestion, overdose risk, or improper medication administration. It can also help monitor treatment effectiveness or detect accidental exposure.
What does a low or undetectable level indicate?
Low or undetectable levels suggest no recent norfentanyl exposure, which may be normal if you’re not currently taking the medication or if it’s been cleared from your system.
Can this test detect other opioids?
This test specifically measures norfentanyl. If you’re concerned about other opioids (e.g., heroin, fentanyl), additional tests may be needed.
  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