Under the previous health service structure, primary care trusts would alert all practices in the local area if there was an individual visiting multiple practices to request specific drugs.
MPs have said that the highlighting of so-called 'doctor shopping' now needs to be "formalised" in order for it to continue with the structural changes in healthcare in UK.
A report recommended that NHS England should issue guidance to local clinical commissioning groups (CCGs), so they take on the gathering of data on patients visiting multiple practices to request specific drugs.
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His representatives said Cassidy, who was hospitalised last week, died "surrounded by those he loved."
The company’s recently appointed Chief Executive Dara Khosrowshahi said the breach was made by two individuals outside the company.