LUDINGTON — Ludington-based general surgeons Nizar Umran, MD, and Bret Autrey, DO, have integrated their medical practices with Spectrum Health Ludington Hospital and the Spectrum Health Medical Group (SHMG). The change is effective February 1. Dr. Umran has been a general surgeon in Ludington since 1976. Dr. Autrey opened his surgical practice here in 2006. Their combined practices will now…