ICD-9-CM diagnosis code (retired)
656.73 — Other placental conditions, affecting management of mother, antepartum condition or complication
About ICD-9-CM 656.73
656.73 is an ICD-9-CM diagnosis code for other placental conditions, affecting management of mother, 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 9 ICD-10-CM codes, such as O43.101 (Malformation of placenta, unspecified, first trimester), O43.102 (Malformation of placenta, unspecified, second trimester) and O43.103 (Malformation of placenta, unspecified, third trimester). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- O43.101Malformation of placenta, unspecified, first trimesterapproximate
- O43.102Malformation of placenta, unspecified, second trimesterapproximate
- O43.103Malformation of placenta, unspecified, third trimesterapproximate
- O43.811Placental infarction, first trimesterapproximate
- O43.812Placental infarction, second trimesterapproximate
- O43.813Placental infarction, third trimesterapproximate
- O43.91Unspecified placental disorder, first trimesterapproximate
- O43.92Unspecified placental disorder, second trimesterapproximate
- O43.93Unspecified placental disorder, third trimesterapproximate
Common questions about 656.73
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.