2017/18 ICD-10-CM Diagnosis Code O41.122

Chorioamnionitis, second trimester

ICD-10-CM Coding Rules
The following code(s) above O41.122 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to O41.122:
  • O00-O9A
    2018 ICD-10-CM Range O00-O9A

    Pregnancy, childbirth and the puerperium

    Note
    • 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
    Type 1 Excludes
    • supervision of normal pregnancy (Z34.-)
    Type 2 Excludes
    • mental and behavioral disorders associated with the puerperium (F53)
    • obstetrical tetanus (A34)
    • postpartum necrosis of pituitary gland (E23.0)
    • puerperal osteomalacia (M83.0)
    Use Additional
    • code from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
    Pregnancy, childbirth and the puerperium
  • O41
    ICD-10-CM Diagnosis Code O41

    Other disorders of amniotic fluid and membranes

      2016 2017 2018 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
    Other disorders of amniotic fluid and membranes
Code History
ICD-10-CM Codes Adjacent To O41.122
O41.1099 …… other fetus
O41.12 Chorioamnionitis
O41.121 Chorioamnionitis, first trimester
O41.1210 …… not applicable or unspecified
O41.1211 …… fetus 1
O41.1212 …… fetus 2
O41.1213 …… fetus 3
O41.1214 …… fetus 4
O41.1215 …… fetus 5
O41.1219 …… other fetus
O41.122 Chorioamnionitis, second trimester
O41.1220 …… not applicable or unspecified
O41.1221 …… fetus 1
O41.1222 …… fetus 2
O41.1223 …… fetus 3
O41.1224 …… fetus 4
O41.1225 …… fetus 5
O41.1229 …… other fetus
O41.123 Chorioamnionitis, third trimester
O41.1230 …… not applicable or unspecified
O41.1231 …… fetus 1

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.