ICD-9-CM diagnosis code (retired)
631.8 — Other abnormal products of conception
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 631.8
631.8 is an ICD-9-CM diagnosis code for other abnormal products of conception. 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 O02.0 (Blighted ovum and nonhydatidiform mole) and O02.89 (Other abnormal products of conception). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 631.8
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.