In general, to make the system as simple as possible and reduce the number of simple rejections - we obscure many incorrect choices from users. This means that if you're looking for a specific master number for acute care, you won't be able to see it unless you select an appropriate service location type. Note also, that we have thousands and thousands of entries - we don't show them to you by default. If you've never used the entry before, just start typing. Your most frequently used items are the only ones to appear by default for most fields, and they will automatically adjust to your usage over time.

Service Location Type (SLT)

A service locations type is an indicator of the type of services being performed.

  • Hospital In-Patient (HIP)

  • Hospital Out-Patient (HOP)

  • Hospital Emergency Department (HED)

  • Hospital Referred Patient (HRP)

  • Hospital Day Surgery (HDS)

  • Community Physicians Office (OFF)

  • Ontario Telemedicine Network (OTN)

  • Independent Health Facility (IHF)

  • Private Diagnostic Facility (PDF)

  • Rehabilitation Treatment Facility (RTF)

For example, if an admitted patient in hospital is receiving continued care - the service location would be HIP and the admission date would be required to bill the claim successfully.

Master/Facility Number

A master number is a unique four character identifier within a physical location, like a hospital. The list of master numbers is located on the MOHLTC's website here. It is constantly changing.


A hospital like "Kingston General Hospital" might have the following master numbers:

  • Acute Care - 1100
    The service location for acute care would be Hospital In-Patient (HIP)

  • Emergency - Department 4105
    The service location for ambulatory care would be Hospital Emergency Department (HED)

Please see the following video tutorial:

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