HARRISBURG — Gov. Tom Wolf will nominate his insurance commissioner, Teresa Miller, to lead Pennsylvania’s Department of Human Services while he waits to see whether lawmakers will approve its merger with the Department of Health.

Wolf made the announcement in an email to employees Thursday, and said the change in duties takes effect Monday. Wolf’s current human services secretary, Ted Dallas, is on medical leave.

Wolf’s office said Dallas will take an advisory role to the governor when he returns to work.

Wolf had proposed merging three other agencies with the Department of Human Services and tapped Miller to lead it, should lawmakers approve it. However, lawmakers are instead considering the two-agency merger.