O26.42 ICD-10-CM Code: Herpes gestationis, second trimester
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
O26.42Herpes gestationis, second trimester
ICD-10-CM diagnosis code · United States clinical modification
Where O26.42 sits
- 1
Chapter 15
Pregnancy, childbirth and the puerperium (O00-O9A)
- 2
Section
Other maternal disorders predominantly related to pregnancy (O20-O29)
- 3
Category O26
Maternal care for other conditions predominantly related to pregnancy
- 4
Subcategory O26.4
Herpes gestationis
- 5
Code O26.42
Herpes gestationis, second trimester
Notes for this code
Inclusion terms
No inclusion terms are listed for O26.42.
Code first
No “code first” instruction is listed for O26.42.
Use additional code
No “use additional code” instruction is listed for O26.42.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for O26.42.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for O26.42.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code O26.42 mean?
O26.42 is the FY 2027 U.S. ICD-10-CM code for “Herpes gestationis, second trimester.”
Is O26.42 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, O26.42 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is O26.42 located in ICD-10-CM?
O26.42 is listed in Chapter 15, Pregnancy, childbirth and the puerperium (O00-O9A), within Other maternal disorders predominantly related to pregnancy (O20-O29) (O20–O29), under category O26, Maternal care for other conditions predominantly related to pregnancy and subcategory O26.4, Herpes gestationis.
What coding notes are listed for O26.42?
No inclusion terms are listed for O26.42 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.