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Defense Health Agency, Great Lakes

The Defense Health Agency–Great Lakes (formerly known as the Military Medical Support Office) (DHA-GL) assists with the coordination of medical care in the United States and District of Columbia for:

  • Active duty service members enrolled in TRICARE PrimeA managed care option available in Prime Service Areas in the United States; you have an assigned primary care manager who provides most of your care.TRICARE Prime or TRICARE Prime RemoteA managed care option for active duty service members and their families who live in designated remote locations in the U.S. (usually more than 50 miles or one hour's drive time from a military hospital or clinic).TRICARE Prime Remote that qualify under the DoD/VA Memorandum of Agreement (MOA) for a  Spinal Cord Injury (SCI), Traumatic Brain Injury (TBI) or Blindness
  • Active duty service members enrolled in TRICARE Prime Remote
  • Non-enrolled active duty service members not managed by a military hospital or clinic 
  • Reserve Component service members in remote areas with Service-approved line of duty (LOD) injuries, illnesses or diseases
  • To find out if you are within 50 miles of an MTF go to: (Enter home zip code and change mileage to 75 miles)
  • If you are within 50 miles of an MTF and need assistance go to: (Enter name of nearest military base)

What We Do


  • Coordinates civilian health care services for remotely-located active duty service members
  • Provides pre-authorization for civilian line of duty (LOD) medical care
  • Collaborates with unit representatives regarding LOD care for remotely-located service members
  • Provides authorization (pre-, concurrent and retro-) for VA medical care for active duty service members accepted under the DoD/VA MOA for diagnosis for SCI, TBI or blindness
  • Authorizes the payment of civilian medical claims


Review the guides below for DHA-GL processes and procedures.

File Date
Defense Health Agency Great Lakes Process Guide 11/14/2019
How to Forward Medical Eligibility Documentation 6/18/2019
How to get a Medical Bill Removed from a Credit Report 11/14/2019
How to Request Pre-Authorization for Line of Duty Medical Care 6/18/2019
How to Submit a Formal Appeal 6/18/2019
Pharmacy Reimbursement for Line of Duty Care 6/18/2019

Request Worksheets

The worksheets below are submitted to the DHA-GL. Instructions and addresses are found on each worksheet.

File Date
DHA-GL Worksheet-01: Medical Eligibility Verification 4/10/2017
DHA-GL Worksheet-02: Pre-Authorization Request 5/31/2018
Formal Appeal Request 6/1/2014

DHA Address: 7700 Arlington Boulevard | Suite 5101 | Falls Church, VA | 22042-5101

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