1. A computer-implemented method for mapping of medical code schemes, said method comprising: processing a plurality of coded concepts to determine a potential match between a code from a first code scheme in the plurality of coded concepts and a code from a second code scheme in the plurality of coded concepts; assigning a probability to each potential match of a code from the first code scheme and a code from the second code scheme; generating an alphanumeric indication of the probability of each potential match between the first code scheme and the second code scheme from the plurality of coded concepts; generating a graphical representation of the plurality of coded concepts; outputting the alphanumeric indication and the graphical representation to a user; and accepting user input to select a match between the first code scheme and the second code scheme; wherein, for the first code scheme and the second code scheme, each code in the first scheme represents a row and each code in the second code scheme represent a column in the matrix such that the probability that a code in the first code scheme is the same as a code in the second code scheme is represented by a cell value at a corresponding matrix position row and column position; wherein the graphical representation comprises a heat map highlighting tight correlation and clustering of coded concepts in relation to probability of each potential match; wherein the heat map and the alphanumeric indication facilitate bulk matching of coded concepts among a plurality of code schemes based at least in part on concept clustering and visual distinction between clusters of concepts and one-to-one mappings.