LOS ANGELES, March 31, 2026 (GLOBE NEWSWIRE) -- A lawsuit unsealed in Los Angeles Superior Court against Sterling Pathology Medical Corporation and its owner Dr. Changgao Yang alleges a decade-long scheme of fraudulent billing practices that defrauded state healthcare programs and private insurers of more than $20 million. The Complaint alleges that "as this country struggled to cope with a devastating pandemic...Sterling Pathology conspired to …