WITH A DAY KIMBALL MEDICAL GROUP PRACTICE, CALL US (860) 963-3857 between 8:00 a.m. - 4:00 p.m. OR EMAIL US patientportalhelp@daykimball.org. FOR QUESTIONS ABOUT YOUR DAY KIMBALL MEDICAL GROUP BILL please contact our billing office for assistance. Call us at (860) 928-9270 Monday thru Friday between 8:00 am. - 5:30 p.m..