Patient Portal ; Contact . Locations Download Our App ... Staff: Dr. Mellick is on staff at Menorah Medical Center, Overland Park Regional Medical Center, Advent Health - Shawnee Mission, and Olathe Medical Center. Board Certifications: American Board of Pediatrics ... 2111 East Kansas City Road Olathe, KS 66061. Main: 913-888-4567. Fax: 913 ....