Yes, CONTACTS is a Scrabble word!

Letter values in Scrabble US: C 3, O 1, N 1, T 1, A 1, C 3, T 1, S 1.

Is it a valid word?

CONTACTS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

close interaction
the act of touching physically
the state or condition of touching or of being in immediate proximity
the physical coming together of two or more things
a person who is in a position to give you special assistance
a channel for communication between groups
(electronics) a junction where things (as two electrical conductors) touch or are in physical contact
a communicative interaction
a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication

Also: physical contact, inter-group communication, contact lens, get through, get hold of.