Instruction Source: O41.1294
Chorioamnionitis, unspecified trimester, fetus 4
Instruction Source: O41.129
Chorioamnionitis, unspecified trimester
Instruction Source: O41.12
Chorioamnionitis
Instruction Source: O41.1
Infection of amniotic sac and membranes
Instruction Source: O41
Other disorders of amniotic fluid and membranes
Excludes 1 (Mutually Exclusive)
- encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
Instruction Source: O30-O48
Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
Instruction Source: O00-O9A
Pregnancy, childbirth and the puerperium
Excludes 1 (Mutually Exclusive)
- supervision of normal pregnancy (Z34.-)
Excludes 2 (Not Included Here)
- mental and behavioral disorders associated with the puerperium (F53.-)
- obstetrical tetanus (A34)
- postpartum necrosis of pituitary gland (E23.0)
- puerperal osteomalacia (M83.0)
Clinical Notes
- 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
- 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: