To amend the Public Health Service Act to increase awareness about the treatment referral routing service of the Substance Abuse and Mental Health Services Administration, and for other purposes.

Helping Americans Seek Treatment Act of 2018 This bill amends the Public Health Service Act to require the Substance Abuse and Mental Health Services Administration (SAMHSA) to conduct a national public awareness campaign regarding its substance abuse treatment referral routing programs. SAMHSA must incorporate into its programs and services information about pre-arrest referral programs, which allow an individual with a substance use disorder to seek assistance from a law enforcement agency without being subject to criminal penalties related to the individual's possession and use of controlled substances.