For help with the MyChildren's Patient Portal, call us at 617-919-4396. We are available Monday, Tuesday, Wednesday, and Friday from 7 a.m. to 5:30 p.m.; Thursday from 7 a.m. to 6:30 p.m.; and Saturday from 8 a.m. to 1 p.m. We are not open on Sundays or major holidays.