Colin Ma, MD Specialist Specialty: Ophthalmology Languages: English, Interpreters Available Gender: Male Education and Certification Medical School: University of Oxford - England. Residency: University of Iowa Hospitals & Clinics. Internship: University of Oxford - England. Fellowship: University of Southern California. Contact Information Practice Name: Retina Northwest Office Locations Primary Address Retina Northwest 3305 Main St, Ste 100 Vancouver, WA, 98663 Phone: 360 699-6666 Fax: 360 - Clinic Hours: Weekdays Secondary Address Retina Northwest 2525 NW Lovejoy St, Ste 100 Portland, OR, 97210 Phone: 503 274-2121 Fax: 503 274-2947 Clinic Hours: M-F 8-5:30p on call 24/7 Weekdays Hospital Locations Primary Address Legacy Good Samaritan Medical Center 1015 NW 22nd Ave. Portland, OR, 97210 Phone: 503-413-7711 Toll-Free: 1-800-733-9959