The overall aim of this study is to determine modifications to Exposure and Response Prevention (ERP) therapy that are needed in order to effectively deliver treatment for Obsessive Compulsive Disorder (OCD) in a community mental health center. This study is the final study in a series of three projects executed to adapt and pilot-test a team ERP (T-ERP) intervention that will optimize therapist time by utilizing paraprofessionals to assist with group-ERP treatment plans. The intervention will be tailored to meet the unique needs of low-SES individuals with OCD and be implemented in a community mental health center (CMHC).

Inclusion Criteria:

1. 18 Years to 65 Years
2. English speaking
3. Primary DSM-IV OCD (identified by the patient and therapist as the most problematic disorder over the past year)
4. At least moderate severity OCD (YBOCS > 16)
5. Not currently on psychotropic medications or on the same psychotropic medications for at least 4 weeks prior to screening
6. Have never received 10 or more sessions of ERP
7. Not currently attending psychotherapy for OCD
8. Low-income based on the U.S. Housing and Urban Development (HUDs) threshold for RI (less than $41,000 per year for individuals).

Exclusion Criteria:

1. Significant cognitive impairment (MMSE < 25)
2. Prominent suicidal ideation
3. Current psychosis, mania, alcohol or drug dependence as assessed by the SCID-P.
4. Prominent Hoarding