Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18

supervision of normal pregnancy (Z34.-)

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

code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

• 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

the listed conditions in the fetus as a reason for hospitalization or other obstetric care to the mother, or for termination of pregnancy

encounter for suspected maternal and fetal conditions ruled out (Z03.7-)

any associated maternal condition

One of the following 7th characters is to be assigned to each code under category O35. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O35 that has a 7th character of 1 through 9.