OCD organises itself around specific obsessional themes. Major subtypes include contamination OCD, harm OCD, relationship OCD (ROCD), scrupulosity OCD, symmetry OCD, and Pure O. Understanding the subtype matters because ERP is tailored to the specific obsessional domain. BABCP accredited specialist OCD treatment in West London. This guide was written by Sanah Younis, a BABCP accredited Cognitive Behavioural Therapist with over 11 years of clinical experience across NHS specialist services and private practice. BABCP accreditation is the UK's highest professional standard for CBT practitioners. The Lyceum offers BABCP accredited CBT therapy face to face in Chiswick, Ealing and the Richmond venue, and online. Session fees are £110 online and £140 face to face. Some insurance or cash plan policies may contribute to costs, subject to individual terms. You can enquire directly about a free 15 minute consultation and check current availability. For further reading, visit the Clinical Guides library at lyceumclinic.co.uk/guides, or book a free consultation at lyceumclinic.co.uk/start.