An apparatus, system, and method for member matching. In one embodiment, the apparatus includes an input adapter, a processor, and an output adapter. The input adapter may receive a first data record from a plurality of data records stored in one or more databases. The processor may generate a first data key from one or more field values in the first data record, compare a second data key associated with a second data record with the first data key associated with the first data record, and identify a match between the first data key and the second data key. In one embodiment, the output adapter may produce an output configured to identify the first data record and the second data record in response to identification of the match.