State Senate President Martin M. Looney, D-New Haven, on Monday urged regulators from the state Office of Health Care Access not to proceed with its review the proposed merger of the Yale-New Haven Health System and Lawrence + Memorial Healthcare until they have received critical pricing data.

“Without this necessary pricing information and other data, the process will lack the openness and transparency required to ensure a competitive health care market that enhances quality of care and improves affordability,” Looney said in a news release. “It is my understanding that Yale-New Haven Hospital has refused to provide the requested information and is claiming that risk adjusted prices do not exist, and if that they did exist, Yale-New Haven Hospital would refuse to provide them because they are proprietary. The claim that the data does not exist lacks credibility.”

OHCA is scheduled to host a continuation of a hearing on the application of the two hospitals to affiliation at 3 p.m. Tuesday at the Holiday Inn in New London. The first part of the hearing took place on July 11.

Looney said he also expressed his concerns about the merger earlier this month in a letter to Connecticut Attorney General George Jepsen and Public Health Commissioner Dr. Raul Pino.

“This proposed merger would have an extraordinary effect on our health care system and the state must ensure that any allowed merger is in the best interests of our citizens,” Looney said in the letter to Jepsen and Pino.