Dpreview tells me that the FZ200 does not have a lens mount for it [ perhaps becuase they feel it is not safe to mount anything on the end of a tromboning lens ] so I am at a loss to know what "lens' you have ordered for it [ unless perhaps a Raynox close-up lens which clips onto the camera lens and would be an excellent purchase if it is big enough to fit the end of the Lumix lens ].
Also what I know as an adaptor I know has been used with the camera but don't know the details*. To overcome the problem of the lack of a filter mounting thread on my old Nikon 5700 I discovered there was a small 'rim' around the lens barrel which suited a step-up ring after I turned off a minute amouint of the thread ... when doing a trial fit it 'stuck' and remained there for the next two or three years quite happilly and useful for just a filter but not an adaptor which in my book is a lens with some weight.
The FZ200 has a single fixed x24 zoom lens with a constant f/2.8 maximum aperture whatever setting of the zoom you use. With no filter thread I hope there is a mounting for a lenshood like on most FZ cameras which would likely need to be removed to fit the Raynox CU lens mount.
Explain further Cheryl what you have and I may be able to be more positive for you
*A question at this forum for Panasonic camera users might be more fruiitful becuase I left the Panasonic FZ cameras with the FZ50 .....
http://lumixuser.co.uk/forum/ .... still have mine but not kept up with developments really.