RESOLVED - Study ID issue Values in the APCD Unique ID (ME998) for all CIGNA entities have been found to be incorrect. While they match across CIGNA entities they do not match to other non-CIGNA entities (it is expected that between 5% and 10% should match other entities). A potential workaround is to group member records on Gender (ME013), Date of Birth (ME014) or Year of Birth (ME014_Year), Member ZIP5 (ME017) or Member ZIP3 (ME017_Zip3) and Member County (ME173). This workaround has risks when full date of birth and zip code are not available. WARNING: Because this matching option does NOT include study ID there is a greater chance of mismatches. Member to claims matching is unaffected. | 