I have the Panasonic DMP BDT 184
Does not read 4K UHD disc

Yes, the device supports the playback of 4K UHD discs. If your Panasonic device indicates that a disc is not compatible, it could be because the disc is damaged or not in the correct format. Make sure the disc is in 4K UHD format and is not damaged. If the problem persists, it may be helpful to update the device to the latest firmware or contact customer service.