TestMark DNA collection sites in Washington support a full range of DNA testing services. Each test follows accredited laboratory procedures and is available in both legal (court-admissible) and personal formats where applicable.
Paternity DNA Testing
Paternity DNA testing in Washington, District of Columbia is the most commonly requested DNA test. It establishes a biological relationship between a father and child using a painless cheek swab. TestMark DNA collection sites in Washington support both legal paternity tests (used for birth certificates, child support, custody, and Social Security) and personal paternity tests for private peace of mind. Legal tests require chain-of-custody documentation and government-issued ID at the collection site.
Learn more about paternity dna testing→Immigration DNA Testing
Immigration DNA testing in Washington, District of Columbia is used by USCIS to verify biological relationships when other documentation is insufficient. TestMark DNA collection sites in Washington follow USCIS-accepted chain-of-custody procedures and coordinate sample handling between tested parties, including samples collected at U.S. embassies abroad. Results are delivered directly to the petitioner or the designated USCIS contact. Testing is always initiated at the request of the USCIS officer handling the petition.
Learn more about immigration dna testing→Maternity DNA Testing
Maternity DNA testing in Washington, District of Columbia confirms the biological relationship between a mother and child. It is used in cases of assisted reproduction, adoption reunification, or to confirm a mother's identity when her relationship to a child is uncertain. Maternity testing follows the same accurate cheek-swab procedure as paternity testing. Both legal (court-admissible) and personal test options are available at TestMark DNA collection sites in Washington.
Learn more about maternity dna testing→Sibling DNA Testing
Sibling DNA testing in Washington, District of Columbia determines whether two people share one or both biological parents. It is typically used when the alleged father is unavailable and is especially useful for inheritance claims, Social Security benefits, or establishing family lineage. TestMark DNA collection sites in Washington support full sibling tests (same mother and father) and half sibling tests (same mother or father only). Including a known parent's sample significantly improves accuracy.
Learn more about sibling dna testing→Grandparent DNA Testing
Grandparent DNA testing in Washington, District of Columbia establishes a biological relationship between a child and one or both paternal grandparents when the alleged father is unavailable. It is often used for Social Security survivor benefits, inheritance claims, or when the father is deceased, incarcerated, or uncooperative. Testing both grandparents, where possible, yields the most conclusive results. Both legal and personal grandparent tests are available at TestMark DNA collection sites in Washington.
Learn more about grandparent dna testing→Home DNA Kit Testing
Home DNA kit testing is available for residents of Washington, District of Columbia who prefer to collect samples in private. Kits are shipped to your address, collected at home using a cheek swab, and returned to the laboratory by prepaid mail. Home kit results are for personal knowledge only and are not admissible in court. For legal DNA testing, samples must be collected at a TestMark DNA collection site in Washington with chain-of-custody documentation.
Learn more about home dna kit testing→