The worldwide IT issues are currently affecting Manx Care including GP systems across the Isle of Man.
The Steam Packet has also been impacted, with passengers onboard only able to pay in cash.
A Manx Care spokeswoman said: “At this time our primary care services have reverted to business continuity plans but patients may experience delays across Manx Care services until systems are restored.
“All other core clinical applications across Manx Care are currently operational. Further updates will be provided as well as advice and guidance on accessing our services.”
The global issues have been pinned on cybersecurity firm CrowdStrike.
Its CEO George Kurtz said: “The issue has been identified, isolated and a fix has been deployed.”
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