Understanding Your Medical Test: What It Is, How It Is Performed, and What Your Results Mean
This test detects the presence of 6-monoacetylmorphine, a specific metabolite of heroin, in your blood to identify recent heroin use.
{"6-MAM is a unique byproduct of heroin breakdown in the body","Its presence in blood confirms recent heroin use within the past 24-48 hours","This test is more specific for heroin than general drug screening tests","Results are reported as either 'Present' or 'Not Detected'"}
Key facts at a glance
- LOINC
- 46263-0
- Short code
- 6-MAM
- Synonyms
- 6MAM Free SerPl Ql
- Category
- chemistry
- Sample
- serum
- Container
- Serum separator tube (SST) or plain red top tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 18 years
- Method
- Immunoassay screening with LC-MS/MS confirmation
- CPT
- 80307
- SNOMED
- 372729004
- Specimen volume
- 2-5 mL serum
- Stability
- Room temperature: 24 hours; Refrigerated (2-8°C): 7 days; Frozen (-20°C): 30 days
- Hemolysis max
- 50
- Lipemia max
- 300
- Icterus max
- 20
- TAT
- 24–72 hours
- Order
- routine
This test is a medical evaluation that helps your doctor check how well your body is working, look for signs of illness, and guide decisions about your care. Your provider may order it during a routine checkup or when you have symptoms that need a closer look.
The 6-monoacetylmorphine (6-MAM) test is a specialized blood test that checks for the presence of 6-MAM, which is a unique metabolite produced when your body processes heroin. Unlike other drug tests that may detect various substances, 6-MAM is specifically only created when heroin is broken down, making it a definitive marker for heroin use.
The test is usually done in a clinic, laboratory, or hospital setting. Depending on the type of test, a trained professional may draw a small sample of blood, collect a urine specimen, or perform a simple scan. The procedure is generally quick, and most people can return to their normal activities right afterward.
A healthcare professional will draw a small sample of blood from a vein in your arm. The blood sample will be collected in a special tube and sent to a laboratory for analysis. The laboratory will use sensitive techniques to determine whether 6-MAM is present in your serum or plasma.
Your results show whether your values fall within the normal range for this test. Normal findings usually suggest no sign of the condition being checked, while abnormal values may point to an infection, inflammation, or another issue that needs follow-up. Your doctor will explain what your specific numbers mean and discuss any next steps with you.
Your test result will typically be reported as 'Present' or 'Not Detected'. If 6-MAM is detected, it indicates recent heroin use, typically within the last 24-48 hours. A 'Not Detected' result means no 6-MAM was found in your blood sample at the time of testing. It's important to discuss your specific results with your healthcare provider, who can explain what they mean in the context of your overall health and treatment plan.
Reference range
Not detected (Negative)N/A
No special preparation required. Inform laboratory of any prescribed or over-the-counter medications. Avoid heroin and related opioids prior to testing.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
The 6-MAM test is clinically significant because it provides definitive proof of recent heroin use. Unlike general drug panels that may produce false positives or cannot distinguish between different opioids, 6-MAM is exclusively produced from heroin metabolism. This makes it valuable for addiction treatment monitoring, forensic investigations, and clinical diagnosis. Healthcare providers may use this test to confirm heroin use, monitor patients in substance abuse treatment programs, or evaluate patients with unexplained symptoms that could be related to opioid use.
Frequently asked questions
How long does 6-MAM stay in my system?
Can this test tell me how much heroin I used?
Will pain medications cause a positive result?
Do I need to prepare anything before the test?
Sources
- 1
- 2
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.
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 15, 2026. · Read our editorial policy