Effective April 1, 2011, code G0431QW is deleted from the Clinical Laboratory Fee Schedule (CLFS). Code G0431 describes a high complexity test, and should not be reported with a QW modifier; the QW modifier indicates a Clinical Laboratory Improvement Amendments (CLIA) waived test.
If this occurs with insemination or intercourse that is timed correctly, the egg may become fertilized. It is important to remember, however, that the hCG within the trigger shot will stay in your urine for 7 to 10 days so you may get a false positive on a home pregnancy test. Because of this, most doctors will wait at least two weeks to give you a blood test designed to test for hCG levels.
So, how long? Trace amounts of hCG can remain the body for as many as fourteen days after hCG injections. The rule of thumb that doctors use is that it takes one day for each 1000 units of hCG to leave your boy. So, if you get a 10,000 unit injection of hCG, it will take approximately ten days for it to all leave your system. Most doctors will err on the longer side of the time frame to ensure that you get an accurate result.