CHANGE: Harvard Pilgrim Cancels Medicare Advantage Plan. “The decision by Wellesley-based Harvard Pilgrim, the state’s second-largest health insurer, was prompted by a freeze in federal reimbursements and a new requirement that insurers offering the kind of product sold by Harvard Pilgrim — a Medicare Advantage private fee for service plan — form a contracted network of doctors who agree to participate for a negotiated amount of money. Under current rules, patients can seek care from any doctor.”