O41.1220

Chorioamnionitis, second trimester, not applicable or unspecified

Billable / specific

O41.1220 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Note: CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
Note: 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)
Note: Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
Note: 1st trimester- less than 14 weeks 0 days
Note: 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
Note: 3rd trimester- 28 weeks 0 days until delivery

Not coded here — never report together with this code.

supervision of normal pregnancy (Z34.-) (from O41)
encounter for suspected maternal and fetal conditions ruled out (Z03.7-) (from O41)

Not included here — may be reported together when both conditions exist.

mental and behavioral disorders associated with the puerperium (F53.-) (from O41)
obstetrical tetanus (A34) (from O41)
postpartum necrosis of pituitary gland (E23.0) (from O41)
puerperal osteomalacia (M83.0) (from O41)

Add a code to identify the following, if applicable.

code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known. (from O41)

The 7th character values that apply to this code (defined at O41). Use the placeholder "X" for missing positions.

Character	Meaning
0	not applicable or unspecified
1	fetus 1
2	fetus 2
3	fetus 3
4	fetus 4
5	fetus 5
9	other fetus