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Latest News from BJC:

Welcome to the Dial 10 Information Page

Updated January 15, 2018 – Missouri Baptist Medical Center and affiliated campuses will move to 10-digit dialing effective March 9, 2018. The following locations will transition beginning at 8 p.m. March 9. To allow adequate time for testing, the system is scheduled to be out of service until 5:30 a.m. March 10. Plan ahead to implement down-time procedures during this period. 

MBMC campus – All buildings
Mason Ridge
Sunset Hills 
Sovereign Court
BJC Medical Group offices on affected campuses


MBMC will soon be changing how we dial our phones – by moving to a 10-digit dial system (area code plus seven-digit number). Here you can find announcements, schedules, and other information about how this change affects you and what you and your team need to do to be prepared.

Changing to 10-digit dialing will provide BJC and MBMC the capacity to continue to support ongoing growth and expansion. It will also create greater flexibility to adapt to new technology and accommodate anticipated external area code changes in the St. Louis region.

The key changes are:

  • Dial area code plus full seven-digit number for all internal and external calls
  • Five-digit and three digit extensions will no longer function
  • No need to dial “9” or “9-1” for external or long-distance calls


What You Need to Know

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MBMC is scheduled for March 9, 2018. This includes all campus facilities.  Mason Ridge, Sunset Hills, Sovereign Court, and the BJC Medical Group offices on campus will also change at the same time.


See Dial plan changes here 

  • These changes will be implemented on March 9, 2018.
  • On the effective date for your location, the change will occur at the telecommunications switch. You will not notice any physical changes to your phone unless your phone is being replaced. 
  • On the effective date for your location, begin using 10-digit dialing (314-XXX-XXXX) that includes the area code, even when calling within the same area code or internally within the facilities. Calls of less than 10 digits will result in a standard recording that the call did not go through. 
  • Internal five-digit and three digit dialing will be eliminated for all calls when this change is implemented at your location.
  • Your phone number will not change, but your current internal extension will now match your phone number. For example, 6-1234 becomes (314) 996-1234.
  • You will no longer need to dial 9 for an outside line or 91 for a long distance call.
  • Your voicemail mailbox number will now be 10 digits – the area code plus the number. For example, 314- 996-1234.
  • If a five- or three-digit extension is used for outcall notification, it will need to be changed to a 10-digit extension.
  • Dialing 911 remains unchanged.
  • We are running out of new extensions.
  • We require greater flexibility for new technologies in 2017 and beyond.
  • We require greater phone number capacity for future growth.
  • We need to address technical issues to maintain and upgrade outdated hardware and software.

Download and print the Quick reference guide here that contains a listing of current five-digit internal extension prefixes and the 10-digit numbers you will need to dial.


If you have any questions, email us at

4901 Forest Park Avenue
St. Louis, Missouri 63108
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