To hide patient details for specific users please open menu > App-settings > User Roles. Choose the applicable user role or create a new one. 

Now deselect the "view patients' contact details" and save the user role.
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The screenshots below explain the results of the settings adjustments. If you would like to use this feature we advise you to create a separate user role. For example “freelance physician”. This will allow you to separate the rights for permanent physicians and freelance physicians.
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Result when hiding patient details