Doctors Office In Lyndhurst, Ohio. Our compassionate medical care, as well as advanced testing and treatment services, take care of you when you need it most. Our mission at this center is to provide you with the specific attention and care necessary to assist you in realizing your particular wellness goal. We strive to do this every day by consistently providing effective personal service, valuable information, and simple-to-follow instructions. Dr. Ionel Donca is a Nephrologist and an Internal Medicine specialist and has a team of Family Nurse Practitioners as a part of the practice. Great Lakes Care specializes in Internal Medicine, Weight Management, Personal Development, Skin Care, Mental Wellness, and Second Opinions.