A collection of devices and materials available for use by a patient/layperson outside a clinical setting to collect and mail a capillary blood sample to a clinical laboratory for diagnostic testing or screening purposes. The kit includes a lancet, a blood collection strip, dry blood collection card/filter paper card, and other items (e.g., alcohol prep pad, disposable lancet, gauze pad, bandage strip, and a container with a requisition form, for mailing to the laboratory); some types may be in the form of a self-contained unit featuring a suction mechanism. This is a single-use device.