The current WEDI Health Identification Card Implementation Guide is Version 1.1 with Errata, April 28, 2011. Card implementations complying with Version 1.0 continue to comply with the new Version 1.1. In the primary change, Version 1.1 specifies how to use suffixes to the base subscriber ID to identify dependents uniquely as described in ASC X12 5010 Implementation Guides. Other adjustments in the guide are largely clarifications.
WEDI Health Identification Card Implementation Guide Version 1.1 with Errata