New lab operators often treat CLIA and COLA as competing options. They aren't. CLIA is the federal law that governs all US clinical laboratory testing; COLA is one of several accreditation organizations approved to assess a lab's compliance with it.
What CLIA requires
Every lab performing testing on human specimens for diagnosis or treatment needs a CLIA certificate matched to the complexity of its testing. Molecular PCR is high-complexity, which carries specific personnel and quality requirements.
Where COLA fits
For high-complexity labs, an accreditation body such as COLA (or CAP) assesses your compliance on CMS's behalf. Choosing the right path — and preparing for the assessment — is exactly where experienced guidance saves months.