He cited the U.S. Immigration and Nationality Act, Section 212, which denies entry to people who have had a physical or mental disorder that may pose a “threat to the property, safety or welfare’’ of themselves or others.

The agent gave her a signed document which stated that “system checks’’ had found she “had a medical episode in June 2012’’ and that because of the “mental illness episode’’ she would need a medical evaluation before being accepted.

U.S. Customs and Border Protection media spokeswoman Jenny Burke said that due to privacy laws, “the department is prohibited from discussing specific cases.’’

MP Mike Sullivan said what has happened to his constituent is “enormously troubling. . . . How did U.S. agents get her personal medical information?’’