A: The accuracy and turnaround time of the testing is the same between a blood specimen and a buccal brush specimen. For nearly all of our tests, the quality of DNA obtained from a blood specimen and a buccal brush specimen is sufficient to complete the testing ordered. We actually prefer buccal brush specimens for all but a few of our tests because they are more easily processed by the lab. There are a few tests for which we require blood, however. To see the list of tests for which Buccal Brushes are not accepted please click here.
Q: Can I use a cheek brush kit that isn't a GeneDx kit?
A: We strongly encourage you to use a GeneDx kit to collect a cheek brush sample. We have optimized our procedures in the laboratory for use with our kits. The worst case scenario is that we cannot complete the test and must request a second specimen. If we receive a kit that is not ours or if a specimen appears to be suboptimal, we generally perform a quick test to determine if the DNA is of a high enough quality to run the test that was ordered. If the DNA is not adequate, we will contact the person who sent the specimen to request another one. This is usually accomplished within the first week of receiving a specimen. Unanticipated problems can arise with any specimen, however, and with each case we make every effort to reduce the time between when we receive a specimen and when we ask for a second one.
Q: Why can't I use a cheek brush kit for certain tests?
A: There are a small number of trouble spots in a handful of the genes we test. Completing these tests in a timely manner requires a different quality of DNA than a cheek brush can provide. Similarly, buccal brushes cannot be accepted for any gene deletion or duplication testing whether ordered individually or as part of a reflexive test. These methodologies include quantitative PCR (CopyDx), MLPA, Next-gen sequencing and GenomeDx oligonucleotide microarray analysis (GenomeDx). Please see test-specific requirements on test information sheet for acceptable specimens.
Q: I am drawing a specimen from an infant. What is the minimum amount of blood required?
A: We would like at least 1-2 cc of whole blood in EDTA (purple top tube) to perform any test.
Q: Can buccal brush specimens be collected on infants?
A: We have had less success in obtaining adequate DNA from buccal brush specimens on infants under the age of 6 months. Therefore, we request blood specimens (1-2 cc of whole blood in EDTA) on small babies.
Q: If more than one test is being ordered on the same patient, is it better to provide a tube of blood for each test?
A: No. GeneDx obtains enough DNA from one specimen to complete a number of tests. We generally discard all but 5 milliliters of whole blood on a patient, because more than that is unnecessary and we have limited space in which to store specimens. Pediatric patients usually don't require more than 2 milliliters. Please call for specifics.
Q: What are the specimen requirements for prenatal testing?
A: The following specimens are necessary for completion of a prenatal test:
- Maternal blood (1-4 ml in a purple-top EDTA tube) is required for maternal cell contamination (MCC) studies. The maternal sample should accompany the prenatal specimen or be shipped to arrive prior to or concurrently with the prenatal sample.
- *Maternal and Paternal blood is required for prenatal array testing.
- If more than one prenatal test is being ordered on a specimen, one of the following is required: 30 ml of Amniotic fluid, 30 mg of Chorionic villi, 3 T25 flasks of cultured amniocytes or cultured chorionic villi.
- In multiple pregnancies, a separate requisition form is required for each fetus.
Q: Can I send DNA?
A: Yes. Please send a minimum volume of 20 ul and minimum concentration of 50 ng/ul (50 ug/ml). For testing on a single exon, we require 1-2 ug of DNA. If we are testing 2-10 exons, we require 5-10 ug and for tests with more than 10 exons, we need 20 ug. For specific DNA requirements please click here.
A: Attn: Accessions
207 Perry Parkway
Gaithersburg, MD 20877
Q: How do I send a specimen?
A: A specimen should be packed in materials that prevent its container from being damaged during shipment. Specimen tubes should be labeled with patient name and date of birth. Unlableled specimen tubes will be rejected by GeneDx. Cheek brush specimens can be sent through the regular postal mail using the envelope addressed to GeneDx that is included with the kit. Blood, prenatal and other specimens should be shipped to us using an overnight delivery service. Minimally, the specimen should be shipped to us with a completed sample submission (requisition) form and payment options form. For more information visit our Specimen Requirements page.
Q: Can I ship specimens by regular postal mail?
A: Cheek brush samples or DNA may be shipped by regular mail. All other types of samples should be sent by overnight or second-day delivery for receipt Tuesday through Saturday. If a sample is collected on a Friday evening or over a weekend then it should be kept in the refrigerator and shipped on the next business day for overnight delivery. Keeping the specimen refrigerated over the weekend will not compromise the quality of the specimen.
Q: Does GeneDx pay for shipping?
A: No, the cost of shipping is the responsibility of the sender. GeneDx provides shipping kits with prepaid FedEx labels for US customers only. To order a kit visit Supply Ordering.
A: Minimally, you will need to complete the Requisition Form and the Payment Options Form and include these with the specimen. Specimens without proper ordering or payment information will be held until the appropriate information is provided to us.
Q: Is the consent document required?
A:You are not required to send GeneDx a completed consent document according to the federal regulations governing clinical laboratories. However, for your convenience, we do provide consent forms for each test we offer. It is important to know that your state government may require documentation of the informed consent process (for a listing, see: http://www.ncsl.org/programs/health/genetics/prt.htm). In addition, although GeneDx does not require the consent form to accompany the sample, we recognize that the informed consent process is an important component to any genetic testing protocol and encourage practitioners to obtain informed consent from patients being tested.
A: Visit our Billing Page for more information on insurance and payment options.
Q: Does GeneDx accept my state's Medicaid?
A: GeneDx is not a participating provider with any state Medicaid plan. For patients with Medicaid, please have Medicaid contact our Accounts Specialist, Beverly Jubela (email@example.com) , 301-519-2100 x106. GeneDx will do our best to negotiate a price and arrange an individual contract directly with Medicaid for the services ordered by a physician. State Medicaid plans that have refused to negotiate with and/or pay GeneDx for services rendered include New York, Maryland, Arizona and California. Please be aware that we are unlikely to have successful negotiations with these plans, and that very rarely we cannot come to an appropriate agreement with other Medicaid plans as well.
Q: Can I set up an institutional billing account?
A: There is generally no need to set up an account with us if you are shipping specimens from a hospital laboratory or physician's office. Simply provide the contact information (name, phone and fax numbers, and address) to which we can mail an invoice and CPT codes for the services rendered.
A: Genetic testing is usually performed as a tool to help the physician make a diagnosis or to help a physician manage a patient's health care. Because the results of genetic testing may lead to additional testing, it is best for the physician to receive the results so that an appropriate plan for the care of the patient can be determined. In addition, the results of genetic testing can sometimes be complicated and difficult to understand. In most cases it is best to report the results to a healthcare professional who has both a relationship with and the time to explain such results to the patient or patient's parents.
Q: Is my test finished yet?
A: Our goal is to provide you with an accurate result in a reasonable time period. The majority of our tests take approximately 6-8 weeks to complete. The time it takes to complete a test varies depending on a number of factors. The size of the gene, the complexity of the interpretation, the occasional need to redesign or repeat a test, and other things can all extend the amount of time it takes for results. Testing can take from 2-10 weeks depending on which genetic test was ordered. The information sheets for each condition (found under Diagnostic Testing) indicate an estimated time frame for completion of the test. These estimates are based on the average amount of time it has taken us to complete the test in the past. As soon as a test is completed the results are faxed and mailed to the referring physician or ordering facility. Positive test results and tests performed on prenatal specimens are also called if a physician's phone number is provided to us.
Q: The test result has been lost or was never received, can you resend it?
A: GeneDx can provide you with a duplicate copy of the test result if you are the ordering physician or are from the ordering facility. We cannot send results to the patient or other physicians involved in the care of the patient without a signed release from the patient authorizing us to do so. When calling for a report, please let us know the first and last name of the patient and when the specimen was sent.
Q: I received an invoice, but not the result.
A: Billing occurs separately from the laboratory analysis and bills are sent out shortly after the specimen is received at GeneDx. We understand that many lab policies require the results before a payment is made. Second notices are faxed out 60 days after the report is issued.
Q: Can a test be expedited?
A: All prenatal specimens for which the mutation in the family is known are expedited. If there are other medical indications for expediting a test, please let us know and we will do our best to get a result out as quickly as possible. The most common indications for expediting a test in the lab are a scheduled or necessary procedure (e.g. surgery, bone marrow transplant) and testing on a pregnancy or family member of a pregnant woman.
A: No. Generally, GeneDx obtains enough DNA from one specimen to allow completion of a number of tests. A second specimen is not necessary.
Q: What is the procedure for adding on further testing to a sample already at GeneDx?
A: An additional test can be added on to a sample already at GeneDx by submitting a written request or required paperwork (Submission Requisition and Payment Option Forms) for the new test to be performed. Please reference the GeneDx accession #, patient's name and date of birth. You must also tell us how the add-on test will be paid for and where the invoice should be mailed. This request can be faxed or emailed to GeneDx at 301-519-2892 or firstname.lastname@example.org.
A: The easiest way to reach us at GeneDx is by email. Please send your question to email@example.com and it will be delivered to the appropriate person.
A: Our CLIA identification number is 21D0969951.
Q: What is GeneDx's tax ID number?
Q: Are you CAP certified?
Q: Are your tests FDA-approved?
A: No. Our tests are developed and validated in-house and the FDA has determined that such clearance or approval is not necessary.
Q: Do you have a New York state license?
A: Yes. Please see our New York Test List.
Q: Does GeneDx comply with the EU Safe Harbor Framework?
A: The company complies with the U.S.-EU Safe Harbor Framework as set forth by the U.S. Department of Commerce regarding the collection, use, and retention of personal information from European Union member countries. The company has certified that it adheres to the Safe Harbor Privacy Principles of notice, choice, onward transfer, security, data integrity, access, and enforcement. To learn more about the Safe Harbor program, and to view the company's certification, please visit http://www.export.gov/safeharbor/
A: To view documents in PDF format, you need to install Adobe Acrobat Reader, a free application distributed by Adobe Systems. All test requisition forms are available here.