Pregnancy, Childbirth and the Puerperium

**Notes:** - CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS - Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes) - 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

**Excludes1:** - supervision of normal pregnancy (Z34.-)

**Excludes2:** - mental and behavioral disorders associated with the puerperium (F53.-) - obstetrical tetanus (A34) - postpartum necrosis of pituitary gland (E23.0) - puerperal osteomalacia (M83.0)

**Use additional code:** - code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.