This article is from the ER FAQ, by Rose Cooper firstname.lastname@example.org with numerous contributions by others.
No. This is a very common misapprehension, however.
Firstly, the actress who played Chloe (Kathleen Wilhoite) and
Amanda Plummer share a certain distinctive acting style that makes it
easy for some people to confuse the two.
Secondly, both actresses appeared on the show "L.A. Law",
each one playing a character who was romantically involved with
Benny, the mentally disabled man who was a regular character on the
series during its later years. Hence, people who answer this
question by saying that "Chloe is the same woman as Benny`s
girlfriend on L.A. Law" are really only muddying the issue further.