RiliBÄK is the Bundesärztekammer guideline on quality assurance in medical laboratory testing, which German laboratories work under, and it covers internal quality controls and regular proficiency testing.
RiliBÄK is the short name for the Bundesärztekammer guideline on quality assurance in medical laboratory testing, and the Bundesärztekammer is the German Medical Association. German medical laboratories work under it, and it covers internal quality controls run alongside customer samples together with regular proficiency testing between laboratories.
For a buyer the practical meaning is that quality here is a daily routine and not a certificate on a wall, because controls are measured with every run while external comparisons happen on a fixed schedule. Aniva has analysis performed by an accredited partner laboratory that holds ISO 15189 accreditation and works under RiliBÄK.
German clinic buyers usually expect to see both of those together, so a supplier who names only one of them is describing half of the arrangement.
In this glossary, Akkreditiertes Labor explains what an accreditation actually covers, ISO 15189 covers the standard behind it, and Referenzbereich covers the ranges these controls protect.
This glossary entry is general information, not medical advice, and it is not intended to diagnose, treat or rule out any condition. Discuss your own results with a clinician who knows your history.

Most people judge their health by how they feel, and a feeling is a blurry picture that is easy to read wrong.
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