IgG Antibody to Mycoplasma pneumoniae (Serum)
This test measures the level of IgG antibodies in your blood that your immune system produces in response to *Mycoplasma pneumoniae*, a common bacterial cause of respiratory infections like pneumonia.
["It helps diagnose past or recent exposure to *Mycoplasma pneumoniae* and supports evaluation of respiratory symptoms."]
Key facts at a glance
- LOINC
- 111026-1
- Short code
- M pneumo IgG Msmt Ser
- Synonyms
- M pneumo IgG Msmt Ser
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- 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
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like cough, fever, or shortness of breath—especially if you’ve been exposed to respiratory illnesses. It can also help confirm a diagnosis when other tests are inconclusive or if you’ve had symptoms for a while.
What to Expect Before the Test
No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. The process usually takes a few minutes. If you’re nervous, let your provider know—they can offer comfort measures.
What the Results Mean
Positive results indicate your immune system has likely encountered *Mycoplasma pneumoniae* in the past, meaning you’ve had an infection. Negative results suggest no recent exposure or infection. Results alone don’t confirm a current illness—your provider will consider symptoms and other tests.
Common Reasons for Testing
Doctors may order this test to investigate persistent or recurrent respiratory issues, unexplained fevers, or when *Mycoplasma pneumoniae* is suspected as a cause of symptoms like bronchitis or pneumonia.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
IgG Anti-Mycoplasma pneumoniae
Frequently asked questions
This test is useful for diagnosing *Mycoplasma pneumoniae* infections, especially when other tests like chest X-rays or cultures are unclear. It can help guide treatment decisions, such as whether antibiotics targeting this bacteria are needed. Results may also help monitor long-term immune responses or recurrence of symptoms.
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your provider will contact you once they’re ready to discuss them.
If you’re prescribed antibiotics for suspected *Mycoplasma pneumoniae*, it’s best to take them before testing, as they may reduce or eliminate detectable antibodies. Always follow your provider’s instructions.
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