As of October 2015, ICD-9 codes are no longer used for medical coding. Instead, use this equivalent ICD-10-CM code, which is an exact match to ICD-9 code 644:
Non-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.
O60.03 is applicable to mothers in the third trimester of pregnancy, which is defined as between equal to or greater than 28 weeks since the first day of the last menstrual period. The following code (s) above O60.03 contain annotation back-references. Annotation Back-References.
The 2022 edition of ICD-10-CM O60.03 became effective on October 1, 2021.