Exp	Description: Highmark Inc. and its health insurance subsidiaries and affiliates collectively are among the ten largest health insurers in the United States and comprise the fourth-largest Blue Cross and Blue Shield-affiliated organization.This X12 Transaction Set contains the format and establishes the data contents of the Healthcare Claim Transaction Set (837) for use within the context of an Electronic Data Interchange (EDI) environment. This transaction set can be used to submit healthcare claim billing information, encounter information, or both, from providers of healthcare services to payers, either directly or via intermediary billers and claims clearinghouses