ICD-9-CM diagnosis code (retired)
642.40 — Mild or unspecified pre-eclampsia, 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 642.40
642.40 is an ICD-9-CM diagnosis code for mild or unspecified pre-eclampsia, 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 O14.00 (Mild to moderate pre-eclampsia, unspecified trimester) and O14.90 (Unspecified pre-eclampsia, unspecified trimester). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 642.40
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.