Michigan Surgical Center Hit by Ransomware Attack, Exposing Patient Social Security Numbers A ransomware attack targeting Michigan Surgical Center, LLC (MSC), a physician-owned outpatient surgical facility in East Lansing, Michigan, has exposed sensitive patient data, including Social Security numbers. The breach was first disclosed by the ransomware group The Gentlemen, which posted on the dark web on June 3, 2026, threatening to release the stolen data within a week. MSC later confirmed the incident and notified affected individuals, formally reporting the breach to the Massachusetts Attorney General on July 17, 2026. The center, founded in 2001, specializes in ophthalmic, plastic, and other outpatient surgeries, serving patients who receive same-day care without hospital admission. The law firm Shamis & Gentile P.A. is investigating the breach, citing potential legal recourse for impacted individuals. The exposure of Social Security numbers heightens risks of identity theft and financial fraud for those affected. No further details on the scope of the breach or the number of individuals impacted have been publicly disclosed.