ICD-10-CM Diagnosis Code O21.9

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

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)

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