Claiming.com have just made us aware that there appears to be a major issue with the Medicare Webservices API.

Items that are currently failing at above normal acceptable levels are:

Bulk Bill claims
Rebate Medicare claims
Patient verifications (all types)

This list may not be exhaustive. 

At this time it appears the issue is a pure rejection of calls being made, a generic "error" response in the return payload, no pattern has been identified at this time.

Claiming.com are going to attempt to get an official or unofficial response from Webservices as soon as possible.