Medial Patellafemoral Ligament Reconstruction

My ortho doctor is starting to perform this procedure for knee instability. Could anyone give me any ideas as to what CPT code to use? I am leaning toward an unlisted code, but want to know if anyone has a better one.
Thank you.

Mpfl

MPFL Reconstruction CPT: reference the following codes/operative note/technique

27420 (reconstruction of dislocating patella: Hauser type procedure)
27422 (reconstruction of dislocating patella; with extensor realignment and/or muscle advancement or release; Campbell, Goldwaite type procedure)
27424 (Reconstruction of dislocation patella; with patellectomy

Thank you for your response

How do I decide what code to use? What's the difference between them?