The mM9 is also named minor/major ninth
Use mMaj9 instead of mM9
Use -^9 instead of mM9
A mM9 is a Minor chord
How to construct a mM9 chord?
Use the following intervals in any order to construct this chord. Start on a specific note on which you want to construct this chord from (for instance the note "C") and calculate each interval on top of it. Afterwards, you will be able to play it on your instrument.