WATERLOO — A second lawsuit could be in the works against the insurers who oversee Iowa’s Medicaid program.Black Hawk County claims UnitedHealthcare, one of the private insurers that handle Medicaid in the state, has shorted the Country View care center by hundreds of thousands of dollars in Medicaid claims.The Board of Supervisors voted unanimously Tuesday to hire outside legal counsel to attempt to collect between $511,000 and $584,000 in claims for residents at the county-operated nursing home’s unit for persistent mental illness.Assistant County Attorney Michael Treinen said UnitedHealthcare only has offered roughly $144,000 to settle the issue.“That is why further action has been authorized on this claim,” Treinen said.