Legal Grandparent DNA Testing Services
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A grandparent DNA test determines a biological relationship between an alleged grandparent and grandchild. In most cases this test is performed when an alleged father is unavailable. Below are the types grandparentage testing types.

How much is a legal grandparent DNA test?
The cost of a legal DNA grandparent test starts at $499.99. DNA sample collection fees are not included in this price. See our full list of legal grandparent testing prices below.
Call 866-205-8356 to schedule an appointment in city near your home nationwide today.
Legal Grandparent Testing Options
| Service Type | Pricing |
| Grandparent DNA Test (1 Grandparent and 1 Grandchild Only) Cheek Swabs | Prices start at $499.99 CLICK TO SCHEDULE AN APPOINTMENT |
| Grandparent DNA Test (1 Grandparent and 1 Grandchild w/Mother) Cheek Swabs | Prices start at $499.99 CLICK TO SCHEDULE AN APPOINTMENT |
| Grandparent DNA Test (1 Grandparent and 2 Grandchildren Only) Cheek Swabs | Prices start at $499.99 CLICK TO SCHEDULE AN APPOINTMENT |
| Grandparent DNA Test (1 Grandparent and 1 Grandchild Only) Cheek Swabs in Two Locations | Prices start at $599.99 CLICK TO SCHEDULE AN APPOINTMENT |
Please note: If the DNA testing specimen or per person option is not listed above does not mean we do not provide this service. Contact Paternity Express at 866-205-8356 to speak with a DNA Consultant today.
What is a legal grandparentage test?
A legal grandparent test is a DNA test used for legal purposes and it determines if grandparent and grandchild have a biological relationship. This testing option requires an established chain of custody. An unbiased third-party DNA sample collector must collect the samples, and an AABB-accredited laboratory must test and analyze the DNA specimens collected from the tested parties.
State and federal government agencies may require legal DNA test results to prove the claimed biological relationship. These may include
- Vital Records for adding a mother’s name to a birth certificate,
- USCIS to acquire a U.S. visa
- U.S. passport acquisition,
- and Social Security Administration to claim benefits.
Please note: Grandchildren under the age of 18 must be accompanied by their mother or legal guardian.
What are the requirements for a legal grandparentage test in New York?
Please note, New York State residents according to the New York State Department of Health (NYSDOH) guidelines are required to submit one of the following documents before scheduling a legal maternity DNA test.
- A prescription referral from an NYS licensed doctor. The prescription must have each New York resident’s name on the prescription.
- A letter from an NYS licensed family law attorney
- Or, a court order from a judge.
Call 866-205-8356 to speak with a DNA consultant to schedule an appointment or to learn more about the process.
When is a legal DNA grandparent test needed?
The first question you should ask is whether you intend to use the results. Standard legal and immigration DNA testing have different requirements. If you need the maternity test results for legal purposes, some of the most common reasons for performing a legal grandparent test include:
- Adoption cases for both domestic and international situations.
- Birth certificate matters, such as adding a father’s name to a birth certificate.
- Immigration purposes, when DNA testing is requested to establish a claimed biological relationship for a U.S. visa, immigration case, or U.S. passport.
- Estate or inheritance cases involving a recently deceased alleged father.
These are some of the most common reasons a legal grandparent DNA test may be performed.
How does a legal DNA grandparent test work?
1. Schedule the test
Speak with a DNA consultant and provide the information needed to establish the case.
2. DNA sample collection appointment
Each participant provides identification and DNA samples are collected under chain-of-custody procedures.
3. Samples are sent to the laboratory
After your samples are collected, the samples are shipped to our partner AABB-accredited laboratory for comparative analysis.
4. Receive your results
Results are typically available within two to three business days after all samples arrive at the laboratory. A copy of your results will mailed to your home and an additional copy will be emailed to you.
How can I schedule an appointment?
Contact our office at 866-205-8356 and allow one of our DNA consultants to assist you with scheduling an appointment at a collection location near you. Below are the locations we serve.
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Frequently Asked Questions
Which method is used to collect my DNA sample?
The standard method used to collect DNA samples is a cheek swab. The swab is placed inside the mouth and brushed against the inside of each cheek for a minimum of approximately 30 seconds.
Another viable DNA sample collection method that can be used for legal purposes is a blood draw or finger prick. Blood and cheek swab samples provide the same level of accuracy for grandparent testing. The main difference between the two collection methods is that blood collection is more invasive, can be more uncomfortable, and is more expensive.
Where can DNA samples be collected?
DNA samples for legal maternity testing are typically collected at an approved collection location. Depending on your geographic location, we may also provide on-site mobile DNA sample collection services for an additional cost.
Contact our office at 866-205-8356 to speak with one of our DNA consultants about mobile collection availability in your area.
How long will it take to receive my legal DNA testing results?
The average turnaround time for you to receive your results is two to three business days from the date in which the lab receives all specimen samples. Upon the completion of your DNA analysis, a copy of the results will be mailed to your home address and an additional copy will be emailed to you.
Is a legal grandparent DNA test accurate?
Yes. A DNA Grandparent test performed for legal purposes is an accurate testing option when an alleged father is unavailable to perform a direct parent and child DNA test. This testing option helps determine if a grandparent and grandchild are biologically related paternally. The accuracy of the lab’s analysis is determined by the quality of the samples submitted to the laboratory.
