Contact Graham Health Center (GHC) Patient Portal. Get in touch with Graham Health Center (GHC) and utilize the safe and secure patient portal to experience the benefits it can offer to you! 408 Meadow Brook Rd, Rochester, MI 48309. . General Hours: M-F 8am-5pm. (Closed for Lunch: 12:30-1:30pm) For additional information about the GHC click here..