Coding Tool

Global Days Calculator

Calculate the Medicare surgical global period for any CPT® code. See pre-op, day-of, and post-op windows.

Returns the global-period code (000 / 010 / 090) for any surgical CPT®.
Computes the exact pre-op, day-of, and post-op date ranges from your surgery date.
Tells you which related E/M visits are included (and which need modifier 24 or 79).

You enter

29881 · surgery date 2026-05-07

You get

090-day global period. Pre-op 2026-05-06 · day-of 2026-05-07 · post-op through 2026-08-05. An unrelated E/M in the window needs modifier 24.

Global Days Calculator is a Starter feature

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