CPT defines trimesters as -
Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
1st trimester- less than 14 weeks 0 days
2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
3rd trimester- 28 weeks 0 days until delivery
Erin Kornovich, CPC | Coding Specialist II – Maternal Fetal Medicine & Physiatry
P: 320-251-2700, ext. 52373
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