What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).
đź“‹Clinical overview
This ICD-10 overview page groups herpes-gestationis codes under a non-trimester parent code. The most accurate billable code usually depends on trimester timing and whether the chart clearly identifies herpes gestationis rather than another pregnancy-related dermatosis.
When is it used?
- May be used when a clinician documents herpes gestationis in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
đź©şClinical context
When commonly used
- Parent-code browsing, coding review, and clinical-reference workflows where the goal is to understand the herpes-gestationis family before selecting a trimester-specific child code.
- Documentation review where the chart identifies herpes gestationis but the user is navigating the family overview page rather than a trimester-specific leaf page.
Common management context
- Overview-level review often includes rash-pattern assessment context, maternal symptom review, and prenatal follow-up planning around pregnancy-related blistering dermatoses.
- The final billable code usually becomes more specific when the chart identifies trimester timing and clarifies whether the documented eruption is specifically herpes gestationis or another pregnancy-related skin disorder.
- Specialist context already linked on this page includes Obstetrician, Gynecologist.
🔍Key distinctions
Important notes
- This parent page is an overview for trimester-specific herpes-gestationis codes rather than the most specific billable leaf code.
- Herpes gestationis remains distinct from PUPPP and other pregnancy-related skin conditions when the chart specifically documents this pregnancy dermatosis.
- This overview page groups trimester-specific herpes-gestationis codes, so the final billable code usually depends on trimester detail and confirmation that the documented pregnancy rash pattern is specifically herpes gestationis rather than another pregnancy-related dermatosis.
Related codes to consider
O26.40Herpes gestationis, unspecified trimester
Related trimester-specific pregnancy dermatosis ICD-10 code; documentation often becomes more specific when the chart identifies trimester timing, herpes-gestationis rash features, or another distinct pregnancy-related skin condition.
O26.41Herpes gestationis, first trimester
Related trimester-specific pregnancy dermatosis ICD-10 code; documentation often becomes more specific when the chart identifies trimester timing, herpes-gestationis rash features, or another distinct pregnancy-related skin condition.
O26.42Herpes gestationis, second trimester
Related trimester-specific pregnancy dermatosis ICD-10 code; documentation often becomes more specific when the chart identifies trimester timing, herpes-gestationis rash features, or another distinct pregnancy-related skin condition.
O26.43Herpes gestationis, third trimester
Related trimester-specific pregnancy dermatosis ICD-10 code; documentation often becomes more specific when the chart identifies trimester timing, herpes-gestationis rash features, or another distinct pregnancy-related skin condition.
Code hierarchy
chapter
15Pregnancy, childbirth and the puerperium (O00-O9A)
block
O20-O29Other maternal disorders predominantly related to pregnancy
category
O26Maternal care for other conditions predominantly related to pregnancy
currentO26
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
ObstetricianGynecologist
Related codes
Sibling codes
O26.0Excessive weight gain in pregnancyO26.1Low weight gain in pregnancyO26.2Pregnancy care for patient with recurrent pregnancy lossO26.3Retained intrauterine contraceptive device in pregnancyO26.5Maternal hypotension syndromeO26.6Liver and biliary tract disorders in pregnancy, childbirth and the puerperiumO26.7Subluxation of symphysis (pubis) in pregnancy, childbirth and the puerperiumO26.8Other specified pregnancy related conditionsO26.9Pregnancy related conditions, unspecified
Mapped diagnoses and classifications
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
O26.4
Replacement codes
O26.40 — Herpes gestationis, unspecified trimesterO26.41 — Herpes gestationis, first trimesterO26.42 — Herpes gestationis, second trimesterO26.43 — Herpes gestationis, third trimester
Common synonyms
Herpes gestationis
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.