Ultimately every claim comes to a close. A claim is closed when your medical condition is likely to not benefit from any treatment that is considered to be necessary and proper.
Necessary and proper treatment is that treatment which is considered to be either curative, rehabilitative, or diagnostic. Once your medical provider determines that you are not likely to benefit from such treatment or it is determined by a group of examiners for either the Department of Labor & Industries or a self-insured employer, then your claim may be closed.
The closure of your claim does not necessarily mean that you are back to where you were before you first opened your claim. It simply means that there has been a determination that you are not likely to benefit from further necessary and proper medical care. At this point, it will be determined whether or not you are entitled to an award for either permanent partial disability or perhaps even pension benefits.