ICD-9-CM diagnosis code (retired)
642.70 — Pre-eclampsia or eclampsia superimposed on pre-existing hypertension, 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 642.70
642.70 is an ICD-9-CM diagnosis code for pre-eclampsia or eclampsia superimposed on pre-existing hypertension, 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 one ICD-10-CM code, O11.9 (Pre-existing hypertension with pre-eclampsia, unspecified trimester). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- O11.9Pre-existing hypertension with pre-eclampsia, unspecified trimesterapproximate
Common questions about 642.70
What is the ICD-10 code for ICD-9 642.70?
- The GEMs map 642.70 to ICD-10-CM O11.9.
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.