52 Reduced Services Mod on Neck Dissections

I am a Head & Neck coder & I have a concern I need some help with.

I was told that when you bill for a Cervical Lymphadenectomy Complete

(38720) or an Cervical Lymphadenectomy (Modified radical Neck Dissection) (38724) & the surgeon does not remove all of the levels of lymph nodes described in the procedure, that a 52 Reduced Services modifier needs to be appended to the case. Can anyone with experience in this procedure confirm that for me?

Any help would be greatly appreciated. Thank You.

52 Reduced Services Mod on Neck Dissections