In most places of the world, there is at least a 12 month wait after bypass
Could be, however, I personally know of one pilot who had a single bypass, and regained his FAA medical in three months...yes, 90 days.
Then, the FAA had second thoughts, and wanted additional testing.
One month more, good to go.
4 months/120 days, total.
OKC appears to be rather well switched on, at least in this guys case.
PS:
This was especially important at the time, because...this fellow was a current and qualified L1011 Captain, and his services were urgently needed, pronto.