Is it cheating if I get a massage by a female masseuse as a married man?

No "happy ending"? Not a problem. 

I've had an injury where I had physio for nearly a year. In that time I had both male and female masseuse, male and female physios. Never felt like it was cheating to have assistance with dealing with the injury. Can't see why anyone would object, as long as everyone was being professional about it. 

umm no unless you have sex with her

One way to consider it.  "Would you consider it as cheating if your wife had a male masseur"?  Between the pair of you there needs to be some thought as to what is reasonable and what is not.

Only if you have sex with her.

It would depend on what is your 

need/intent in getting the massage, 

and what kind of massage you get. 

For example, many would consider 

a nuru massage to be cheating. 

Only if you indulge in a 'happy ending'.

What I define as cheating may or may not be what your WIFE defines it as.

It is your WIFE that you have to keep happy .. not me.

Ask HER how she feels about this, and if she is comfortable, do it with her approval.  If she isn't, and you go anyway, then you risk losing your wife and being divorced.

Make your choice, but try to base it off of reality.

Your wife decides which actions of yours SHE considers to be you cheating on her. 

Just as YOU decide which actions of hers YOU consider to be her cheating on you.

You do not get to decide what SHE thinks your cheating is or isn't.

Ask your wife what she thinks.

There's your answer, genius.