A careful approach is a must. Armed, ideally with the correct fret lifting pliers, you need to start at one end and gently manipulate the edge of the pliers under the fret, then work your way across.
Sometimes the fret will lift out very easily, other times not so. If it seems stubborn, then it's probably safe to assume that it has been glued in. You will then need to use a soldering iron to heat up the fret and melt the glue. Things to be aware of: You need to not hold the iron on the fret for too long, as scorching of the fretboard can occur. Also if there is an edge binding, it can melt.
If the board is rosewood or similar, you are very likely to get some chipping out. There are fretboard protectors available to mitigate this issue.
If you do get chip out, then rosewood dust and very thin super glue will be required for repairs.
I doubt that the fret will be re usable, so have a measure up and order a replacement (or two) Northwest guitars stock fret wire in small quantities.
Unless you already have all the tools, it might be more cost effective to pay a tech to do it.
Good luck with it.