Choose a laboratory and ask for specific instructions Special expertise and experience in fragile X testing are the most important criteria for selecting a laboratory for this testing. Interpretation of results is complex and can involve numerous subtleties. It is not necessary for the laboratory to be near you. It is common practice to mail samples and they are not hurt in any way by a day of transit. Before collecting a sample, call the laboratory to check exact sample requirements, shipping instructions and address.
Discounts are sometimes available if payment is received with the sample.
In general, more policies cover testing for diagnostic than for carrier identification purposes. If coverage is promised, be sure to ask for a 'preapproval number'. Using this number on the claim can shorten the time to reimbursement. It is also important to check for any restrictions the insurance policy places on which lab can be used, since sometimes a contract with a specific lab is involved. In many cases when a specialist orders a test, a referral is necessary from the primary care physician in order to gain reimbursement.