Syntellis Performance Solutions is McLaren's patient portal partner. Frequently Asked Questions. Can I sign up my spouse, child or another family member for My McLaren Chart? ... McLaren Northern Michigan - (231) 487-7751; McLaren Oakland - (248) 338-5163; McLaren Port Huron - (810) 987-5000, Monday - Friday, 8 a.m. to 4 p.m..