A GAO report also found that DoD wages for all physician specialties are below median private-sector wages.
Officials have said about 18,000 positions will be cut.
Lawmakers are expressing concern.
More than 900 personnel provided care aboard the ship.
With the amount of equipment and coordination needed, "rarely does it ever work out so perfectly."
Officials with North American Rescue, which creates the lifelike TOMManikin, are pushing new tools for training medics.
One veteran was found to have been injected with insulin, despite no history of diabetes.
Vice Adm. Raquel Bono oversaw the largest changes to the military health system since Tricare was introduced in 1996.
Army doctors who treated victims of the recent mass shooting in El Paso said the emergency room scene was like a war zone,
The Defense Health Agency wants troops, family members and the public to know that vector-borne diseases are preventable.