Serum/Plasma Immunoassay for Anti-Cardiolipin Antibodies (IgG and IgM) with Quantitative Measurement
This blood test measures levels of antibodies that may indicate an autoimmune condition called lupus or other connective tissue disorders.
["Helps assess potential autoimmune activity linked to certain blood clotting or inflammatory conditions."]
Key facts at a glance
- LOINC
- 69037-0
- Short code
- LPT PW max/CD19 NFr Bld FC
- Synonyms
- LPT PW max/CD19 NFr Bld FC
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 0.8
- Ref high
- 1.2
- Critical range
- — – 5 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- flow-cytometry
- CPT
- 85610
- SNOMED
- 396252006
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test detects two types of anti-cardiolipin antibodies—IgG and IgM—against cardiolipin, a phospholipid found in cell membranes. These antibodies can be elevated in conditions like lupus, antiphospholipid syndrome, or other autoimmune diseases.
Why It Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms of autoimmune disease (e.g., joint pain, fatigue, skin rashes) or if you’ve been diagnosed with conditions like lupus or antiphospholipid syndrome.
Common Conditions Linked to Positive Results
Elevated levels may suggest an increased risk of blood clots, chronic inflammation, or autoimmune flare-ups. However, false positives can occur, so results should be interpreted by a medical professional.
What to Expect Before the Test
No special preparation is needed, but avoid consuming alcohol or certain medications (like blood thinners) for 24 hours before testing if instructed by your provider.
Reference range
INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A
Inform your healthcare provider if you are taking blood thinners. No special preparation required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test helps diagnose or monitor conditions where antibodies against cardiolipin play a role, such as lupus-related clotting disorders or recurrent miscarriages. It’s not a standalone diagnosis but often used alongside other tests.
Short name
Anti-Cardiolipin Antibodies (IgG/IgM) Test
Frequently asked questions
Why might my test results be positive when I don’t have symptoms?
Can lifestyle changes affect my antibody levels?
Is this test used to diagnose lupus?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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 16, 2026. · Read our editorial policy