This is because healthcare professionals within the public sector often provide team-based care at several locations. More details of the accesses that have been done (such as listing by institution names) may be made available progressively.
If you have any feedback, questions or suspected irregularities on the access made to your records in the NEHR, please write to nehr.feedback@ihis.com.sg. Do include a screenshot of what is shown on the NEHR Access History to help us look into the case.