Lossless account compression for health care patient benefits eligibility research system and methods

A method for identifying medical claims eligible for reimbursement, comprising:

• sorting medical claims of a service provider into clusters of medical claims and non-clustered medical claims, wherein each of said clusters comprises a group of constituent medical claims all relating to the same patient;
• creating a composite medical claim for each of said clusters, wherein each said composite medical claim comprises data representative of all said constituent medical claims within the respective cluster;
• executing a query against the benefit provider's database for each said composite medical claim and each said non-clustered medical claim;
• receiving an indication as to whether the benefit provider's database contains a record that is responsive to each said query;
• for each said indication that is affirmative with respect to one of said non-clustered medical claims for which the benefit provider's database comprises one or more matching records, placing said one of said non-clustered medical claims and said one or more matching records in a file;
• for each said indication that is affirmative with respect to one of said composite medical claims, executing an additional query against the benefit provider's database for each said constituent medical claim within the respective cluster associated with said one of said composite medical claims;
• and
• for each said additional query associated with one of said constituent medical claims for which the benefit provider's database comprises one or more additional matching records, placing said one of said constituent medical claims and said one or more additional matching records in said file.