The privacy groups, however, dispute that claim. "Even if the HES dataset stored in Google's cloud services does not contain a patient's name or NHS number, the data there may be easy to link to a specific individual and hence will often constitute sensitive personal data," they said.
The ICO should therefore investigate the potential breaches of U.K. laws and regulations resulting from the uploading of patient data to Google's cloud services, the groups said.
The ICO did not immediately reply to a request for comment.
Loek is Amsterdam Correspondent and covers online privacy, intellectual property, open-source and online payment issues for the IDG News Service. Follow him on Twitter at @loekessers or email tips and comments to firstname.lastname@example.org