Veterans Affairs Secretary David Shulkin says his department is seeking to close perhaps more than 1,100 VA facilities nationwide as it develops plans to allow more veterans to receive medical care in the private sector.

At a House hearing Wednesday, Shulkin said the VA had identified more than 430 vacant buildings and 735 that he described as underutilized, costing the federal government $25 million a year. He said the VA would work with Congress in prioritizing buildings for closure and was considering whether to follow a process the Pentagon had used in recent decades to decide which of its underused military bases to shutter, known as Base Realignment and Closure, or BRAC.

"Whether BRAC is a model that we should take a look, we're beginning that discussion with members of Congress," Shulkin told a House appropriations subcommittee. "We want to stop supporting our use of maintenance of buildings we don't need, and we want to reinvest that in buildings we know have capital needs."

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In an internal agency document obtained by The Associated Press, the VA pointed to aging buildings it was reviewing for possible closure that would cost millions of dollars to replace. It noted that about 57 percent of all VA facilities were more than 50 years old. Of the 431 VA buildings it said were vacant, most were built 90 or more years ago, according to agency data. The VA document did not specify the locations.

While President Donald Trump's budget blueprint calls for a 6 percent increase in VA funding, Shulkin has made clear the government's second-largest agency with nearly 370,000 employees will have to operate more efficiently and that budget increases should not be considered a given in future years. The department recently announced hiring restrictions on roughly 4,000 positions despite the lifting of the federal hiring freeze and also left open the possibility of "near-term" and "long-term workforce reductions." Shulkin is also putting together a broader proposal by fall to expand the VA's Choice program of private-sector care.

The Pentagon's BRAC process often stirred controversy in the past as members of Congress expressed concern about the negative economic impact of shuttering military bases and vigorously opposed closures in their districts.

Rep. Jeff Fortenberry, R-Neb., a vice chair of the appropriations panel, told Shulkin that Congress was looking forward to working with the VA "constructively" on the issue in part by determining how excess VA buildings could be put to good community use, such as for fire-fighting, security or landscape maintenance.

"Don't ever use the term BRAC because it brings up a lot of bad memories," Fortenberry cautioned. "You automatically set yourself up for a lot of controversy."

In effort to curb further missteps by the department, Mr. Trump recently signed an executive order to establish an Office of Accountability and Whistleblower Protection within the VA.

"The Office will help the Secretary of Veterans Affairs to discipline or terminate VA managers or employees who fail to carry out their duties in helping our veterans. The Office will also identify barriers to the Secretary's authority to put the well-being of our veterans first," the order says.

The VA has been treading carefully three years after the wait time scandal that plagued the department nationwide.

Shulkin told CBS News back in April that there's a "bipartisan" commitment to fixing the VA under Mr. Trump