U.S. ICD-10-CM · FY 2027

O26.4 ICD-10-CM Code: Herpes gestationis

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

O26.4

Herpes gestationis

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where O26.4 sits

  1. 1

    Chapter 15

    Pregnancy, childbirth and the puerperium (O00-O9A)

  2. 2

    Section

    Other maternal disorders predominantly related to pregnancy (O20-O29)

  3. 3

    Category O26

    Maternal care for other conditions predominantly related to pregnancy

  4. 4

    Code O26.4

    Herpes gestationis

More specific choices

Codes under O26.4

O26.4 is a non-billable category. Choose the child code that best matches the documented diagnosis.

O26.40

Herpes gestationis, unspecified trimester

O26.41

Herpes gestationis, first trimester

O26.42

Herpes gestationis, second trimester

O26.43

Herpes gestationis, third trimester

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for O26.4.

Code first

No “code first” instruction is listed for O26.4.

Use additional code

No “use additional code” instruction is listed for O26.4.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for O26.4.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for O26.4.

Transparency

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.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code O26.4 mean?

O26.4 is the FY 2027 U.S. ICD-10-CM code for “Herpes gestationis.”

Is O26.4 a billable or specific ICD-10-CM code?

No. O26.4 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is O26.4 located in ICD-10-CM?

O26.4 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.

What coding notes are listed for O26.4?

No inclusion terms are listed for O26.4 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

Keep exploring

Related O26 codes

O26.0

Excessive weight gain in pregnancy

O26.1

Low weight gain in pregnancy

O26.2

Pregnancy care for patient with recurrent pregnancy loss

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