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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, Great Lakes
P.O. Box 886999
Great Lakes, IL 60088-6999

For Priority Mail:

Defense Health Agency, Great Lakes
320 A-B Street
P.O. Box 886999
Great Lakes, IL 60088-6999

Last Updated 5/28/2014