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ICD-9-CM diagnosis code (retired)

642.04 — Benign essential hypertension complicating pregnancy, childbirth, and the puerperium, postpartum condition or complication

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 642.04

642.04 is an ICD-9-CM diagnosis code for benign essential hypertension complicating pregnancy, childbirth, and the puerperium, postpartum 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 2 ICD-10-CM codes, such as O10.03 (Pre-existing essential hypertension complicating the puerperium) and O10.93 (Unspecified pre-existing hypertension complicating the puerperium). All of these are approximate matches, so review the record to pick the right one.

ICD-10-CM equivalents

Common questions about 642.04

What is the ICD-10 code for ICD-9 642.04?

The GEMs map 642.04 to ICD-10-CM O10.03 and O10.93.

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.