CLIA: The Federal Floor
The Clinical Laboratory Improvement Amendments set the federal quality requirements for any lab examining human specimens, personnel qualifications, quality control, method validation, calibration, proficiency testing, specimen handling, and record keeping, with oversight increasing as test complexity rises. A CLIA certificate means the laboratory is legally authorized to perform the covered testing.
CAP: The Peer Review
The College of American Pathologists accredits labs through peer-based inspections using detailed, discipline-specific checklists plus ongoing proficiency testing, where labs receive samples with unknown values and must get them right through their routine process. CAP has “deeming authority” under CLIA, but the two aren't interchangeable: Rythm is CLIA-certified, and Rythm is CAP-accredited. If CLIA is the operating license, CAP is something like the Michelin star: voluntary, prestigious, and earned through expert peer inspection.
CLEP: The New York Bar
The Clinical Laboratory Evaluation Program, run by New York State's Wadsworth Center, requires a state permit for labs located in New York or accepting New York specimens with its own inspections, personnel review, and test-category authorization. Rythm holds that permit. For a nationwide service, New York authorization is a meaningful signal, because it's one of the strictest state programs in the country.
Where the FDA Fits
The FDA regulates devices, assays, and reagents not laboratory operations. For Rythm: the Tasso+ collection device is FDA-cleared, and the laboratory runs under CLIA, CAP, and CLEP. Accreditation doesn't excuse a lab from validating its own methods, which is why Rythm separately establishes that every specimen-and-assay combination it reports performs appropriately.
Does At-Home Collection Lower the Standard?
No. “At home” describes where the sample starts, not where the science happens. Once your sample reaches the lab, it enters the same regulated clinical workflow as any other specimen and samples that don't meet quality criteria are rejected rather than reported.