Kodex O21.1

Hierarchy

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

O21.1

Hyperemesis gravidarum, starting before the end of the 20th week of gestation, with metabolic disturbance such as carbohydrate depletion
Hyperemesis gravidarum, starting before the end of the 20th week of gestation, with metabolic disturbance such as dehydration
Hyperemesis gravidarum, starting before the end of the 20th week of gestation, with metabolic disturbance such as electrolyte imbalance

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

supervision of normal pregnancy (Z34.-)
- Z34 Encounter for supervision of normal pregnancy

O30-O48 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)

mental and behavioral disorders associated with the puerperium (F53.-)
- F53 Mental and behavioral disorders associated with the puerperium, not elsewhere classified
A34 Obstetrical tetanus
postpartum necrosis of pituitary gland (E23.0)
- E23.0 Hypopituitarism
M83.0 Puerperal osteomalacia