644.13 — Other threatened labor, antepartum condition or complication

644.13 is an ICD-9-CM diagnosis code for other threatened labor, antepartum condition or complication. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.

The CMS General Equivalence Mappings translate it to 3 ICD-10-CM codes, such as O47.02 (False labor before 37 completed weeks of gestation, second trimester), O47.03 (False labor before 37 completed weeks of gestation, third trimester) and O47.1 (False labor at or after 37 completed weeks of gestation). All of these are approximate matches, so review the record to pick the right one.