642.20 — Other pre-existing hypertension complicating pregnancy, childbirth, and the puerperium, unspecified as to episode of care or not applicable

642.20 is an ICD-9-CM diagnosis code for other pre-existing hypertension complicating pregnancy, childbirth, and the puerperium, 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 4 ICD-10-CM codes, such as O10.119 (Pre-existing hypertensive heart disease complicating pregnancy, unspecified trimester), O10.219 (Pre-existing hypertensive chronic kidney disease complicating pregnancy, unspecified trimester) and O10.319 (Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, unspecified trimester). All of these are approximate matches, so review the record to pick the right one.