gestational diabetes
GUIDELINE 15, 2, g, states Pregnant women who are diabetic should be assigned a code from category O24. . Diabetes mellitus in pregnancy, childbirth, and the puerperium, first, followed by the appropriate diabetes code(s) (E08-E13) from chapter 4.
Then, under the guidelines for ch 15) , it says to use a code from Z3A, weeks of gestation, to identify the specific week of pregnancy.
So I ended up with O24.419, Z3A.33 for 33weeks gestation.