CFR › Title 21 › Part 864 › §864.782521 CFR §864.7825Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Identification. A sickle cell test is a device used to determine the sickle cell hemoglobin content of human blood to detect sickle cell trait or sickle cell diseases.(b)Classification. Class II (performance standards).