HELP - 31623 and 31624 bundled?

Hi All,

Please could you let me know if 31623 and 31624 are bundled. When we bill 31628, 31623 and 31624 we hit an edit stating that 31623 is bundled with 31624.Are they bundled? even if i add a modifier 51 to 31623, there is an edit. but with modifier 59 on 31623 the claim goes through.

31628

31624

31623 claim is denied by Medicare.

Could you please of possible, gve me information on where i can find Medicare's multiple endoscopy rule.

Thanks

HELP - 31623 and 31624 bundled?