Master Numbering System (MNS)

This system maintains the master institution numbers for all Ontario health care facilities including hospitals, long term care facilities, community health services, and others. The MNS files are used by many of the Ministry of Health and Long-Term Care (MOHLTC) systems for the production of reports and for publishing an annual Code Book. Each organization has been assigned a unique four digit identifying code. The Master Numbers are also used by the Canadian Institute for Health Information in clinical data reporting.

For more information


Data Not Available

This data might be made available in the future. We are reviewing the data in this record to determine if it can be made open. [Learn more]

Additional Info

Field Value
Geographic coverage Ontario
Geography Breakdown
Source URL/Address
Author Email
Maintainer branch
Last Validated Date 2017-01-17
Update frequency Other
Access instructions