Gerard B Chamberlin MD MPH PC. 6242 East Arbor Avenue, Suite 123, Mesa, AZ 85206 (Directions) 480-930-4600. 34.84 miles. Banner Casa Grande Medical Center. 1800 East Florence Boulevard, Casa Grande, AZ 85122 (Directions) 520-381-6300. 4.33 miles. Banner Hospitalists at Banner Baywood Medical Center..