The state has suspended the credentials for a Kennewick respiratory therapist for at least two years.
Robert Robinson had a sexual relationship with the daughter of one of his clients and had inappropriate contact with two others, according to the state Department of Health.
He reached a settlement with the health department before a hearing scheduled April 30.
Robinson began having a seven-month sexual relationship with the daughter of one of his patients in 2007, according to the health department's settlement agreement.
In 2008, he inappropriately touched a different woman he was helping with breathing treatments at Kadlec Regional Medical Center in Richland, the health department said.
And he was accused of misconduct with a patient he began treating for pneumonia in 2009 at Kadlec.
Robinson has not worked at Kadlec since June 2011.
He can petition for reinstatement of his license two years after the agreement was signed Feb. 18. He must also show that he passed an ethics program with the Center for Personalized Education for Physicians.