Bring a Government-Issued ID
Adults bring a driver's license, state ID, or passport. Children under 18 do not need ID. A birth certificate is helpful for legal tests but not required for personal tests.

All collection sites are CLIA-certified - the federal standard for clinical laboratory testing.
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| Monday | 7:30 AM - 4:30 PM |
| Tuesday | 7:30 AM - 4:30 PM |
| Wednesday | 7:30 AM - 4:30 PM |
| Thursday | 7:30 AM - 4:30 PM |
| Friday | 7:30 AM - 4:30 PM |
| Saturday | Closed |
| Sunday | Closed |
In Washington, DC, TestMark DNA collects samples at 1133 21st Street NW, Building 2 of Lafayette Centre, on the east side of 21st Street just north of L Street. Foggy Bottom-GWU, Farragut North, Farragut West and Dupont Circle Metro stations are all within about half a mile.
Building 2 of Lafayette Centre, the three-building office complex filling the block between L and M Streets and 20th and 21st Streets NW, is where TestMark DNA collects samples in Washington, at 1133 21st Street NW. The building stands on the east side of 21st Street, a few steps north of L Street, in the Golden Triangle business district. It is already a medical address: MedStar Health's Lafayette Centre practices run primary care, specialty clinics and laboratory services from Building 2, and the DC Chamber of Commerce is a tenant as well. George Washington University Hospital, at 900 23rd Street NW, is about a third of a mile away. For DNA testing in Washington, DC, give the 21st Street number rather than the complex name, because Lafayette Centre spans three buildings.
Four Metrorail stations are within half a mile, straight-line. Foggy Bottom-GWU is the closest at roughly a third of a mile, with Farragut North, Farragut West and Dupont Circle each just under half a mile. Farragut North and Dupont Circle are on the Red Line; Foggy Bottom-GWU and Farragut West serve the Blue, Orange and Silver Lines. When a legal result is headed for a parentage or child support case, the District's Family Court works out of the Moultrie Courthouse at 500 Indiana Avenue NW, and the Attorney General's Child Support Services Division is at 400 6th Street NW.
In Washington, DC, TestMark DNA is at 1133 21st Street Northwest, in Building 2 of Lafayette Centre near 21st and L Streets.
Call our team and we'll walk you through the right test, answer your questions, and confirm your nearest location.
(866) 702-7644Visit 1133 21st St Nw, Washington, DC 20036. A quick, painless cheek swab is all that is needed.
Get DirectionsReceive your confidential results delivered securely by email. Results are accurate, private, and legally defensible.
DNA testing at our Washington, District of Columbia collection site is straightforward, painless, and typically takes less than 30 minutes. Here is what to know before you visit 1133 21st St Nw.
Adults bring a driver's license, state ID, or passport. Children under 18 do not need ID. A birth certificate is helpful for legal tests but not required for personal tests.
Collection takes about a minute. A trained technician rubs a soft cotton swab on the inside of the cheek for each tested party. No needles, no blood, no fasting required.
Most visits to 1133 21st St Nw in Washington take under 30 minutes from check-in through sample collection, including the chain-of-custody paperwork completed in person.
Collection sites in Washington, District of Columbia handle chain-of-custody (legal) tests ordered through TestMark DNA. We recommend scheduling your visit so everyone arrives prepared: call (866) 702-7644 and we'll confirm the right test, book your collection, and tell you what ID to bring.
Infants, toddlers, and minors are all eligible. The cheek swab is the same regardless of age. For legal tests involving a minor, the custodial parent or legal guardian must be present to sign the chain-of-custody form.
Once all samples are received at the accredited laboratory, standard turnaround is 3 to 5 business days. Results are delivered confidentially by encrypted email or secure portal. They are never released over the phone.
Questions before you visit? Call (866) 702-7644 for a free consultation.
DNA test pricing in Washington, District of Columbia depends on the specific test you need. Call TestMark DNA for a free consultation. We will confirm the exact price for your situation before you visit the collection site.
Paternity, maternity, sibling, grandparent, immigration, and home kit tests are each priced differently. Legal (court-admissible) tests cost more than personal-knowledge tests because they include chain-of-custody documentation.
DNA paternity and relationship testing is classified as a non-medical test and is not reimbursed by health insurance plans. Payment is collected directly at the time of testing.
We walk you through pricing on the phone before you commit. There is no charge to call, no charge to ask questions, and no obligation to book a test after the consultation.
Tests that involve additional parties (for example, a paternity test that also includes the mother, or sibling tests with multiple siblings) often qualify for a per-person discount. Confirm by phone before your appointment.
Get an exact quote for your test in under five minutes. Call (866) 702-7644.
Both options available - call to confirm which is right for your situation.
Not sure which test you need? Call for a Free Consultation - (866) 702-7644This Washington, District of Columbia collection site serves patients arriving from 20036 and the surrounding ZIP codes listed below. If you are closer to a neighboring city, our nearby TestMark DNA locations may be a shorter drive.
We schedule collections for customers from any ZIP code. The list above reflects the nearest service area for Washington.
Each link goes to the city hub with all TestMark DNA collection sites available in that city.
2021 K St Nw Ste 725, Washington, DC 20006
View Hours & Details →1145 19th St Nw Ste 601, Washington, DC 20036
View Hours & Details →2150 Pennsylvania Ave Nw, Washington, DC 20037
View Hours & Details →2233 Wisconsin Ave Nw Ste 425, Washington, DC 20007
View Hours & Details →106 Irving St Nw Ste 1506, Washington, DC 20010
View Hours & Details →Get DNA testing in Washington started today
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