CPT® Code 86723

1. Indications

The laboratory test coded as CPT® 86723 is indicated for the detection of antibodies to Listeria monocytogenes in patients who may be at risk for listeriosis. The following conditions and symptoms warrant the performance of this test:

• Fever A common symptom that may indicate an underlying infection, particularly in vulnerable populations.
• Muscle Pain Often associated with infections, muscle pain can be a sign of systemic illness.
• Nausea This symptom may arise from gastrointestinal disturbances linked to L. monocytogenes infection.
• Diarrhea A frequent symptom of gastrointestinal infections, which may be present in cases of listeriosis.
• Headache Can occur in conjunction with other symptoms, particularly in cases of severe infection.
• Stiff Neck This symptom may indicate meningitis, which can be caused by L. monocytogenes.
• Confusion Neurological symptoms such as confusion may arise in severe cases of listeriosis.
• Loss of Balance This can be a neurological sign associated with central nervous system involvement.
• Seizures A serious symptom that may occur in severe cases of listeriosis affecting the central nervous system.
• Pregnancy Pregnant women are particularly at risk due to the potential for the bacteria to cross the placenta, affecting both the mother and the fetus.

2. Procedure

The procedure for testing antibodies to Listeria monocytogenes involves several key steps, each critical for accurate diagnosis and assessment of potential infection. The first step is the collection of a blood sample, which is performed through a process known as venipuncture. This procedure involves inserting a needle into a vein, typically in the arm, to draw blood. It is important that this step is reported separately to ensure proper coding and billing. Following the blood collection, a lumbar puncture may be performed to obtain cerebrospinal fluid (CSF). This procedure involves inserting a needle into the lower back to access the spinal canal and collect CSF, which is also reported separately. Once both samples are collected, they are subjected to testing using a semi-quantitative complement fixation method. This laboratory technique allows for the detection and measurement of antibodies present in the serum and CSF, providing valuable information regarding the patient's immune response to Listeria monocytogenes.

3. Post-Procedure

After the completion of the antibody testing for Listeria monocytogenes, patients may be monitored for any immediate post-procedure effects, particularly following the lumbar puncture, which can sometimes lead to headaches or discomfort at the puncture site. It is essential for healthcare providers to provide appropriate post-procedure care instructions, which may include recommendations for hydration and rest. Patients should also be informed about potential symptoms to watch for, such as increased headache, fever, or any neurological changes, which may necessitate further medical evaluation. The results of the antibody tests will be interpreted by the healthcare provider, who will discuss the findings with the patient and determine any necessary follow-up actions based on the results and the patient's clinical presentation.