CPT® Code 82106

1. Indications

Alpha-fetoprotein (AFP) testing in amniotic fluid is indicated for the following conditions:

• Neural Tube Defects - Screening for conditions such as spina bifida and anencephaly.
• Chromosomal Abnormalities - Detection of abnormalities including Down syndrome (trisomy 21) and Edwards syndrome (trisomy 18).
• Omphalocele - Assessment for this congenital defect associated with abdominal wall malformations.

2. Procedure

The procedure for measuring alpha-fetoprotein (AFP) in amniotic fluid involves several critical steps:

• Step 1: Amniocentesis - The first step in the procedure is the performance of amniocentesis, a medical procedure in which a thin needle is inserted through the abdominal wall into the uterus to collect a sample of amniotic fluid. This is typically done under ultrasound guidance to ensure the safety of both the mother and the fetus. The procedure is usually performed between 14 and 22 weeks of gestation, which is the optimal time frame for obtaining accurate results.
• Step 2: Sample Collection - Once the needle is correctly positioned, a small amount of amniotic fluid is withdrawn. This fluid contains fetal cells and various substances, including alpha-fetoprotein, which are crucial for the subsequent analysis. The amount of fluid collected is generally sufficient for testing while minimizing any risk to the fetus.
• Step 3: Laboratory Analysis - After the amniotic fluid sample is obtained, it is sent to a laboratory for analysis. The laboratory will measure the level of AFP present in the fluid. Elevated or decreased levels of AFP can provide important information regarding the risk of neural tube defects and chromosomal abnormalities in the fetus.

3. Post-Procedure

Following the amniocentesis procedure, patients are typically monitored for any immediate complications, such as cramping or bleeding. It is common for healthcare providers to advise patients to rest and avoid strenuous activities for a short period after the procedure. Results from the AFP testing may take several days to process, and patients will be informed of the findings during a follow-up appointment. If abnormal levels of AFP are detected, further diagnostic testing or counseling may be recommended to assess the health of the fetus and discuss potential next steps.