In response to the the health reform bill President Obama is expected to sign today, health insurance industry groups warned that premiums will rise and the chief executive of CIGNA Corp. said the sweeping measure does nothing to rein in medical costs. David Cordani, the CIGNA CEO, said the reform and the so-called cost-shift from Medicaid to private insurance would worsen as millions of eligible people are added to the Medicaid rolls. The program's low reimbursement rates to doctors and hospitals will mean higher medical prices for people with private insurance, Cordani said.