Wiki When can 29879 be billed with 29886?

[Carol.Dohmen]

When can 29879 and 29886 be billed together? Can they be billed together if performed on different compartments of the same knee or only if performed on separate knees? I know that 29886 is the column one code and 29879 is column two, so I assume 29886 should only be billed if no modifier is warranted.

Thank you for your help.