A prominent Seattle-area pain doctor will face a lifetime of restrictions under a new agreement with health regulators, bringing to an end a sweeping investigation that closely examined the deaths of more than a dozen patients around the state.Under the agreement with Dr. Frank Li, he will remain suspended from practicing medicine for at least another year and will subsequently face a range of other limitations, including a requirement that he only prescribe controlled substances when patients are in acute pain. And in those cases, Li will only be allowed to prescribe up to seven-day quantities.Li was the medical director and sole shareholder of Seattle Pain Centers. The company’s eight clinics across the state were shuttered after the Washington Medical Commission suspended his license in 2016.Micah Matthews, deputy executive director at the Washington Medical Commission, said the resolution ends the case before it would go to a full hearing, which could have resulted in a dismissed case or the full revocation of Li’s license. Li will have to petition to get his license back after his yearlong suspension ends, Matthews said.“We’re pleased with the order and how we feel it will protect patients,” Matthews said.Under the agreement, Li doesn’t admit to wrongdoing. His attorney, Tom Fain, said in an email Friday that opioid use in pain care is a complex matter and that Li did his best to treat legitimate pain patients.