Actually, it means the pilot is medically disqualified for one reason or another but is not officially on SCK leave and is not NOQ yet.

This could happen when a pilot has no SCK or DSA time available but still must be removed from trips due to (possibly temporary) medical disqualification. The pilot may or may not be on STD or LTD at that moment, but would not have been out long enough to be non-current for landings or missed training events.

That's my story and I'm stickin' to it...