To direct the Comptroller General of the United States to conduct reviews of certain budget requests of the President for the medical care accounts of the Department of Veterans Affairs.

Veterans Healthcare Improvement Act This bill requires the Comptroller General, for each of FY2018-FY2020, to: (1) review the budget requests for the Department of Veterans Affairs' Medical Services, Medical Support and Compliance, and Medical Facilities accounts contained in the President's budget request for that fiscal year; and (2) report review results to the congressional veterans, appropriations, and budget committees.