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ICD-10-CM Code O26.42
Herpes gestationis, second trimester

Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
Female Only
Female Only
Code is only used for female patients.
Maternity Only
Maternity Only
Code is only used for diagnoses related to pregnancy.
Second Trimester
Second Trimester Only
Code is only used for patients in the second trimester of pregnancy (14 to 26 weeks).
| ICD-10 from 2011 - 2016

O26.42 is a billable ICD code used to specify a diagnosis of herpes gestationis, second trimester. A 'billable code' is detailed enough to be used to specify a medical diagnosis.

The ICD code O264 is used to code Gestational pemphigoid

Gestational pemphigoid or pemphigoid gestationis (PG) is a dermatosis of pregnancy, being an autoimmune blistering skin disease that occurs during pregnancy, typically in the second or third trimester, and/or immediately following pregnancy. It was originally called herpes gestationis because of the blistering appearance, although it is not associated with the herpes virus.

Specialty: Obstetrics
MeSH Code: D006559
ICD 9 Code: 646.8

Micrograph of gestational pemphigiod showing the characteristic subepidermal blisters and abundant eosinophils. HPS stain.

Source: Wikipedia

MS-DRG Mapping

  • DRG Group #781 - Other antepartum diagnoses with medical complications.


Other specified complications of pregnancy, delivered, with or without mention of antepartum condition (approximate match)
Other specified complications of pregnancy, antepartum condition or complication (approximate match)

This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code O26.42 and a single ICD9 code, 646.83 is an approximate match for comparison and conversion purposes.

Parent Code: O26.4 - Herpes gestationis

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/O2642