ICD-9-CM diagnosis code (retired)
642.71 — Pre-eclampsia or eclampsia superimposed on pre-existing hypertension, delivered, with or without mention of antepartum condition
About ICD-9-CM 642.71
642.71 is an ICD-9-CM diagnosis code for pre-eclampsia or eclampsia superimposed on pre-existing hypertension, delivered, with or without mention of antepartum condition. 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 4 ICD-10-CM codes, such as O11.1 (Pre-existing hypertension with pre-eclampsia, first trimester), O11.2 (Pre-existing hypertension with pre-eclampsia, second trimester) and O11.3 (Pre-existing hypertension with pre-eclampsia, third trimester). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- O11.1Pre-existing hypertension with pre-eclampsia, first trimesterapproximate
- O11.2Pre-existing hypertension with pre-eclampsia, second trimesterapproximate
- O11.3Pre-existing hypertension with pre-eclampsia, third trimesterapproximate
- O11.4Pre-existing hypertension with pre-eclampsia, complicating childbirthapproximate
Common questions about 642.71
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.