Our FAQs


Under a federal rule that is now in effect, patients can now receive test results from diagnostic information service providers without first being authorized by a physician. Please feel free to reach out to a Client Services Representative at cs@a2zdx.com or call 732-542-3200, option 2.

We are open Monday-Friday 9 am to 5 pm.

Patient Billing and Payment

To see a sample patient invoice, including detailed explanations, click here.

Insured Patients

A2Z will file claims directly with your Insurance provider. It is therefore imperative that A2Z have accurate and complete billing information. Please provide us with any secondary insurance that supplements your primary coverage so that we can file the claim with the secondary carrier.

Federally funded programs and state specific laws do not permit the routine waiver of patient responsible amounts (deductibles, coinsurance, or copays).

It is the policy of A2Z to bill any secondary insurance payers for the deductible, coinsurance, and copayment amounts. If after all payers have remitted payment, it is A2Z’s policy to bill and collect from the patient any remaining amounts from any deductibles, coinsurance, or copayment as determined by the insurance payer.

A2Z accepts personal checks and all major credit cards. Payments may be processed through A2Z’s billing vendor or online through the A2Z web portal.


A2Z Billing – 718-313-0549 x229

If insurance information is not provided, we may send the patient a bill for the charges.

If A2Z has already billed the insurance company and have had no response from them after a reasonable length of time, A2Z may contact the patient to assist us with the insurance company to process the bill and/or appeal the claim. This is to avoid any possible timely filing issues with the insurance carrier.

In the event that A2Z does not participate in an insurance network, please contact our billing department.

A2Z Billing – 718-313-0549 x229

A2Z will work with the patient to establish reasonable payment arrangements. The patient will only be sent to a collection agency if they fail to forward payments received from their insurance company to A2Z for services. Sending patients to a collection agency will be A2Z’s last resort.

Once your insurer has processed your claim, you will receive an Explanation of Benefits (EOB) from your insurer informing you of the amount it will pay for your laboratory services. The EOB is not an invoice or bill, but it may indicate that a balance remains which is your responsibility. That balance may include your copayment, deductible, or other costs outlined in your terms of coverage. If you have a question about your EOB or your terms of coverage, contact your insurance company.

Uninsured Patients

If you do not have insurance or your health care benefits do not cover clinical laboratory testing services, you will have to pay for the tests performed by A2Z.

Often these tests are available at a discounted price or costs are waived if financial hardship can be documented

A2Z accepts cash, personal checks, and all major credit cards. Sending patients to a collection agency will be A2Z’s last resort.

Stool Collection FAQs

Instructions are provided with each kit. Or you can click here for stool collection instructions.

The tubes are different because your doctor wants us to run different tests. The tube with the blue top and the scoop should be no more than half filled. For the tube with the liquid use the swab to obtain a small sample of stool. The swab is then placed into the tube with the liquid and the cap is secured tightly on the tube. Do NOT use the swab more than one time. Only a small amount is needed for testing.

Stool samples are sent priority overnight, so we will receive it the next day.

Fresh stool (in tube without liquid) must be sent to the lab within 24 hours. Stool samples in the tube with liquid may be kept at room temperature for up to 4 days. The sooner you send it the better.

Preferably not, it is best if a stool sample is not compromised by water, blood, or urine. Try to take specimen from an area on the collection device that hasn’t been contaminated.

No. The toilet might have contaminated the sample. It is best if a stool sample is not compromised by water, blood, or urine.

Yes, they can.