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Defense Health Agency, Great Lakes

For remote active duty and Reserve Component service members, the Defense Health Agency (DHA), Great Lakes (fomerly known as MMSO): 

  • Gives pre-authorization for civilian medical care
  • Authorizes payment of civilian medical claims
  • Coordinates civilian health care services
  • Collaborates with unit representatives for line of duty care

>>Learn More about DHA, Great Lakes Services

Phone  1-888-647-6676—follow menu prompts 
Web www.tricare.mil/GreatLakes  
Address  Defense Health Agency-GL
Suite 304
2834 Green Bay Road
North Chicago, IL 60064-3091

Last Updated 8/20/2014