The Medicare 270/271 Eligibility system is currently returning responses with higher than normal average response times. Many requests are receiving a proper 271 response from Medicare, but the average response time for these requests is higher than normal. A number of requests are encountering socket issues or receiving AAA03=42 'System Unavailable' time out responses from the system.
CMS IT is working to resolve these issues as quickly as possible. There is no ETA to full resolution of these issues.
Medicare Customer Assistance Re: Eligibility (MCARE) Help Desk