21. A non-transitory computer readable medium storing instructions that when executed by a computer cause the computer to perform operations comprising: receiving an empirically established expected auditor error level of an auditor based on an assessment of the auditor; selecting audit parameters comprising an expected coder error level and the empirically established expected auditor error level of the auditor; selecting a sample batch of coded medical documents for auditing by the auditor, the sample batch of coded medical documents selected from a universe of coded medical documents stored on one or more storage devices, the selection based at least in part on the selected audit parameters; receiving audited medical documents corresponding to the selected sample batch of coded medical documents, wherein the audited medical documents include corrections by the auditor; calculating a medical document score for each of the audited medical documents based on medical document corrections received from the auditor and applying weighted factors, wherein the weighted factors comprise predefined weights assigned to diagnosis and procedure codes in each of the audited medical documents; calculating a sample score for the audited medical documents based on a function of the calculated medical document scores; designating at least one of an upper control limit and a lower control limit based on the expected auditor error level; and comparing the sample score against the at least one upper and lower control limits to determine an acceptability of the sample score.
21. A non-transitory computer readable medium storing instructions that when executed by a computer cause the computer to perform operations comprising: receiving an empirically established expected auditor error level of an auditor based on an assessment of the auditor; selecting audit parameters comprising an expected coder error level and the empirically established expected auditor error level of the auditor; selecting a sample batch of coded medical documents for auditing by the auditor, the sample batch of coded medical documents selected from a universe of coded medical documents stored on one or more storage devices, the selection based at least in part on the selected audit parameters; receiving audited medical documents corresponding to the selected sample batch of coded medical documents, wherein the audited medical documents include corrections by the auditor; calculating a medical document score for each of the audited medical documents based on medical document corrections received from the auditor and applying weighted factors, wherein the weighted factors comprise predefined weights assigned to diagnosis and procedure codes in each of the audited medical documents; calculating a sample score for the audited medical documents based on a function of the calculated medical document scores; designating at least one of an upper control limit and a lower control limit based on the expected auditor error level; and comparing the sample score against the at least one upper and lower control limits to determine an acceptability of the sample score. 24. The non-transitory computer readable medium of claim 21 , further operable to cause the computer to perform operations comprising: repeating the evaluation over a period of time to compile a plurality of sample scores; and tracking a measure of variance in the sample scores across the period of time.