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Wiki Trimester difined

lngast

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Hello All...Do you know of a chart or something that defines exactly what weeks fall in what trimesters? We are having a bit of a problem where our docs are saying 2nd trimester ultrasound, but the weeks are on the cusp. We want to get it right to submit a clean claim the first time. Thanks!!
 
The AAPC course states:

1st trimester less than 14 weeks 0 days

2nd trimester 14 weeks and 0 days to less than 28 weeks 0 days

3rd trimester 28 weeks and 0 days until delivery.

Medical Coding Training 2018 pg 134 chapter 15
 
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