Why this exists

A toxicology result is only meaningful if you know whose sample it is. In practice that assurance usually rests on procedure — a witnessed collection, a signature, a label — and procedure fails. When it fails, the consequence lands on a patient: an unexplained positive, a treatment agreement terminated, sometimes a report to another agency.

This matters more, not less, given what is on the urine drug testing evidence page. Immunoassay results are presumptive until confirmed, false positives are well documented across every major drug class, and a survey of 911 clinical and laboratory professionals found concerning gaps in interpretation among the physicians most likely to be acting on the result. If a test that can be misread is also attached to the wrong person, there is no defense left for that patient at all.

How it works

• A buccal swab taken once at enrollment establishes the identity anchor.
• Subsequent specimens are matched against that anchor, so the chain runs from the person to the result rather than from a label to a result.
• The anchor is used for one purpose — confirming that this specimen came from this person. It is not a clinical genetic test, and it is not the same thing as metabolic determination, which is a separate, separately consented process.