Grace Yoon, CNP, MS, RN Image Phone 617-355-8518 Fax 617-730-0392 Email Email Me Print Profile Request an Appointment Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Phone: 617-355-6000 Listen Grace Yoon, CNP, MS, RN Medical Services Programs & Services Ophthalmology Locations Boston Boston Children's Hospital 300 Longwood Ave. Boston, Massachusetts 02115 Phone: 617-355-6000