Acenocoumarolfldmcnc
This test measures the amount of acenocoumarol, an anticoagulant medication, in your blood to ensure you are receiving the correct dose.
{"Acenocoumarol is a blood-thinning medication used to prevent blood clots","Regular monitoring helps maintain therapeutic effectiveness while reducing bleeding risk","Blood samples are typically collected from a vein in your arm"}
Key facts at a glance
- LOINC
- 79152-5
- Short code
- ACEN
- Synonyms
- Acenocoumarol Fld-mCnc
- Category
- chemistry
- Sample
- serum
- Container
- Serum separator tube (SST, gold top) or plain red top tube. Avoid heparinized tubes as they may interfere with some assays.
- Units
- N/A
- Ref low
- 0.5
- Ref high
- 2
- Critical range
- 0.2 N/A – 4 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 18 years
- Method
- Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) or High-Performance Liquid Chromatography (HPLC) with UV detection
- CPT
- 80299 (Therapeutic drug monitoring; not otherwise specified) or 82491 (Chromatographic assay, therapeutic drug, quantitative)
- SNOMED
- 424573004 (Acenocoumarol measurement) or 373499006 (Anticoagulant therapy)
- Specimen volume
- 2-5 mL of serum minimum
- Stability
- Room temperature: 7 days; Refrigerated (2-8°C): 14 days; Frozen (-20°C or below): 30 days. Protect from light as acenocoumarol is light-sensitive.
- Hemolysis max
- 50
- Lipemia max
- 300
- Icterus max
- 20
- TAT
- 24–72 hours
- Order
- routine
What is this test?
The acenocoumarol test measures the concentration of acenocoumarol in your blood serum. Acenocoumarol is an oral anticoagulant (blood thinner) belonging to the vitamin K antagonist class. This medication is prescribed to prevent and treat blood clots in conditions such as deep vein thrombosis, pulmonary embolism, and certain heart conditions like atrial fibrillation.
How is the test performed?
A healthcare professional will draw a blood sample from a vein in your arm. The sample is then sent to a laboratory where the concentration of acenocoumarol is measured. The results help your doctor determine if your current dosage is appropriate.
Reference range
Therapeutic range: 0.5-2.0 mcg/mL (50-200 ng/mL). Target INR range: 2.0-3.5 for most indications. Reference range may vary based on indication and individual patient factors. Consult with prescribing physician for patient-specific target range.N/A
Collect specimen as trough level, just before next scheduled dose. Inform laboratory of dose timing. Report any recent dose adjustments, missed doses, or changes in medications. Notify of any bleeding, bruising, or signs of thrombosis. Maintain consistent dietary vitamin K intake.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Why do I need this test?
How often should I have this test?
Does this test require fasting?
What if my acenocoumarol level is too high?
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 10, 2026. · Read our editorial policy