Abstract: Provided herein are systems, devices, and methods for performing optical multianalyte detection in a sample, such as a human blood sample. The system processes sample in a single-use support pack that holds the blood sample and contains pipette tips, buffers, reagent preparation wells and a monolayer. Sample is transferred from the sample pack to a single-use disc consumable that contains microwells pre-filled with dried chemistries, plasma separation features, and a hematocrit channel. The instrument comprises a cell imager, an absorbance module comprising a spectrophotometer, a fluorescent laser scanning module, and a camera. The system uses only a small amount of blood from a single heparinized sample, to simultaneously provide results for a full panel of routine blood tests spanning elecochemistry, clinical chemistry, hematology, immunoassays and combinations thereof.