BJC Healthcare is likely to be excluded from the state’s new health insurance exchange because of the health provider’s high medical charges, according to St. Louis area health brokers and consultants. Anthem Blue Cross & Blue Shield in Missouri, the state’s largest seller of individual health insurance policies, has decided to operate a “narrow network” both on and off the health insurance exchange that would not include BJC Healthcare facilities and physicians, according to those experts. They also said that Anthem is still deciding whether or not to include Chesterfield-based Mercy Health’s hospitals and physicians in its network of health providers for individual policies sold on the Missouri exchange. Federal officials plan to announce specific details regarding the Missouri exchange, including its participating insurers and their networks of health providers, on or before Oct. 1. Products to be be included on the exchange are still being finalized.