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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 Prime or 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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