27280 will include fixation instrumentation, and the instrumentation add-on codes can't be used with this code.
(Use 22846 in conjunction with 22100-22102, 22110-22114, 22206, 22207, 22210-22214, 22220-22224, 22310-22327, 22532, 22533, 22548-22558, 22590-22612, 22630, 22633, 22634, 22800-22812...