What is the history of mcrg? MCRG began serving the Central Florida Community as a solo practice at Orange Memorial Hospital (now Orlando Regional Medical Center) in 1949.Who is the mcgee group? The McGee Group is an independent, family-owned American company committed to supporting and serving businesses of all sizes, from independent eye care professionals and specialty retailers to large optical chains and department stores.What is the phone number for mcgraw hill customer service? Customer Service. Hours of Operation: Monday-Friday: 8:00 AM to 6:00 PM EST. Phone: (800) 338-3987. Fax: (800) 953-8691. By Mail: McGraw-Hill. P.O. Box 182605. Columbus, OH 43218.