Wow, the add-on table starts to look better, good catch GSchnitzer
Here's the shot that reveals the existence of the red panel to the left of the doorframe
but obviously we cannot see whether it's plain or not, although I believe this may just be the same as the one as seen in the "That Which Survives" transporter room scene.
Because the sickbay scene is from "Let That Be Your Last Battlefield" and in the same episode the panel with the GNDN on it
makes its onscreen appearance in the A-frame corridor. I am not aware that they usually removed items during shooting to relocate these elsewhere...(could have caused continuity problems)