If the proxy's legal relationship with the patient changes, the proxy must (and the patient may) immediately stop using MyChart to access the Patient's information and inform CHMC immediately by calling CHMC at 877-508-7607 or 513-636-5019 or sending written notice to CHMC at CHMC-MyChart, MLC 9009, 3333 Burnet Ave Cincinnati, OH 45229-3039..