ICD-9-CM 300.6 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 300.6 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
A disorder characterized by persistent or recurrent episodes of feeling detached from one's self (either one's body or one's mental processes), although the sufferer remains aware that this is only a feeling and does not represent reality
A feeling of altered reality characterized by a feeling of unreality, or being unreal