ICD-9-CM diagnosis code (retired)
644.10 — Other threatened labor, unspecified as to episode of care or not applicable
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 644.10
644.10 is an ICD-9-CM diagnosis code for other threatened labor, unspecified as to episode of care or not applicable. 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 2 ICD-10-CM codes, such as O47.00 (False labor before 37 completed weeks of gestation, unspecified trimester) and O47.9 (False labor, unspecified). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 644.10
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.