Hyperemesis gravidarum, mild or unspecified, starting before the end of the 20th week of gestation
↓
O21 Description: Excessive vomiting in pregnancy ↓
O20-O29 Description: Other maternal disorders predominantly related to pregnancy (O20-O29) Exclude2:
maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)
↓
O00-O9A Description: Pregnancy, childbirth and the puerperium Exclude1:
supervision of normal pregnancy (Z34.-)
Exclude2:
mental and behavioral disorders associated with the puerperium (F53.-)
obstetrical tetanus (A34)
postpartum necrosis of pituitary gland (E23.0)
puerperal osteomalacia (M83.0)
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
Use Additional Code:
code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.