11. A method comprising: receiving, at a processor, a selection of a first audit rule; receiving, at the processor, a selection of a second audit rule; applying the first audit rule to audit billing data and to produce first audit rule results, wherein the first audit rule results identify a first subset of exceptions of a plurality of exceptions within the billing data, wherein each exception of the plurality of exceptions represents an instance of misbilling associated with the billing data; applying the second audit rule, distinct from the first audit rule, to audit the billing data and to produce second audit rule results, wherein the second audit rule results identify a second subset of exceptions of the plurality of exceptions within the billing data; presenting audit results, including the first subset of exceptions and the second subset of exceptions, to a user via a display coupled to the processor, wherein the audit results include one or more indications corresponding to each exception of the first subset of exceptions and the second subset of exceptions, and wherein each indication of the one or more indications specifies which audit rule detected a particular corresponding exception; and after presenting the audit results, receiving, at the processor, a selection of a particular audit rule from the user, wherein the particular audit rule is one of the first audit rule and the second audit rule, and wherein the particular audit rule is selected based on the audit results.
11. A method comprising: receiving, at a processor, a selection of a first audit rule; receiving, at the processor, a selection of a second audit rule; applying the first audit rule to audit billing data and to produce first audit rule results, wherein the first audit rule results identify a first subset of exceptions of a plurality of exceptions within the billing data, wherein each exception of the plurality of exceptions represents an instance of misbilling associated with the billing data; applying the second audit rule, distinct from the first audit rule, to audit the billing data and to produce second audit rule results, wherein the second audit rule results identify a second subset of exceptions of the plurality of exceptions within the billing data; presenting audit results, including the first subset of exceptions and the second subset of exceptions, to a user via a display coupled to the processor, wherein the audit results include one or more indications corresponding to each exception of the first subset of exceptions and the second subset of exceptions, and wherein each indication of the one or more indications specifies which audit rule detected a particular corresponding exception; and after presenting the audit results, receiving, at the processor, a selection of a particular audit rule from the user, wherein the particular audit rule is one of the first audit rule and the second audit rule, and wherein the particular audit rule is selected based on the audit results. 12. The method of claim 11 , wherein the particular audit rule is baselined to be applied to future billing data.