Open-label Feasibility Trial of HD-tDCS During Cognitive Behavioral Therapy for Cocaine Use Disorder

Inclusion Criteria

* Between 18 and 65 years-of-age.
* Meet current DSM-5 criteria for Cocaine Use Disorder (CocUD), moderate or severe
* Professed interest in CocUD treatment or reducing cocaine use.
* Understand and comply with study procedures
* Positive urine result for cocaine metabolite in at least one screening visit.

Exclusion Criteria

* Current DSM-5 diagnosis of any non-cocaine substance use disorder (SUD) other than alcohol use disorder-mild or cannabis use disorder-mild
* Epilepsy or a history of multiple seizures
* Taking any medications known to reduce seizure threshold
* History of migraines, ringing in the ears, and/or a head injury that resulted in a diagnosis of concussion and/or loss of consciousness
* Current scalp condition (e.g. psoriasis) or head wound that has not completely healed
* Currently pregnant or hoping to become pregnant at any point during the study
* Significant current suicidal or homicidal ideation
* Metal plate in skull or other embedded metal fragments in body or other bodily metal
* Claustrophobia or other MRI contraindications
* Fitted with electrical implants such as pacemaker
* Present with clinically significant symptoms of acute cocaine or opioid withdrawal (these individuals would be rescheduled after resolution of acute withdrawal, if possible).