Patient Portal. Access your medical information on demand. Merit Health Biloxi. Merit Health Biloxi; Contact; Merit Health Biloxi. 150 Reynoir St Biloxi, MS 39530 (228) 432-1571. 15Min. About Us; Directions; Cedar Lake Oncology; Cedar Lake Oncology has served patients on the Mississippi Gulf Coast for several years and is a department of Merit ....