ICD-10-CM Code O41.121
Chorioamnionitis, first trimester
Non-Billable CodeNon-Billable means the code is not sufficient justification for admission to an acute care hospital when used a principal diagnosis. Use a child code to capture more detail.
7th Character RequiredCode requires 7th Character Extension identifier. This 7th Character usually captures Episode of Care information, such as "Initial Encounter," "Subsquent Encounter," or "Sequela."
First Trimester OnlyCode is only used for patients in the first trimester of pregnancy (0 to 13 weeks).
ICD Code O41.121 is a non-billable code. To code a diagnosis of this type, you must use specify a 7th character that describes the diagnosis 'chorioamnionitis, first trimester' in more detail. The 7th characters that can be added, and the resulting billable codes, are as follows:
|7th Digit||Billable Code||7th Digit Specifies|
|0||O41.1210||not applicable or unspecified|
What is 7th Character Extension?For codes less than 6 characters that require a 7th character a placeholder 'X' should be assigned for all characters less than 6. The 7th character must always be the 7th position of a code. E.g. The ICD-10-CM code T67.4 (Heat exhaustion due to salt depletion) requires an Episode of Care identifier. T67.4XXA Initial Encounter or T67.4XXD Subsequent Encounter. More Info
The ICD code O411 is used to code Chorioamnionitis
Chorioamnionitis also known as intra-amniotic infection (IAI) is an inflammation of the fetal membranes (amnion and chorion) due to a bacterial infection. It typically results from bacteria ascending into the uterus from the vagina and is most often associated with prolonged labor. The risk of developing chorioamnionitis increases with each vaginal examination that is performed in the final month of pregnancy, including during labor.
|MeSH Codes:||D002821, D002821|
|ICD 9 Codes:||658.4, 762.7|
Micrograph showing chorioamnionitis. The clusters of blue dots are inflammatory cells (neutrophils, eosinophils and lymphocytes). H&E stain.