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ICD-10 Guide
ICD-10 CodesO26.42

O26.42

Billable

Herpes gestationis, second trimester

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/08/2025

Code Description

ICD-10 O26.42 is a billable code used to indicate a diagnosis of herpes gestationis, second trimester.

Key Diagnostic Point:

Herpes gestationis, also known as pemphigoid gestationis, is an autoimmune blistering disorder that typically arises during the second trimester of pregnancy. It is characterized by the development of itchy, blistering lesions that often begin on the abdomen and can spread to other areas of the body. The condition is thought to be related to the body's immune response to placental proteins, leading to the formation of antibodies that attack the skin. While herpes gestationis is not directly harmful to the fetus, it can cause significant discomfort for the mother and may lead to complications such as preterm birth if severe. Management typically involves the use of topical corticosteroids and antihistamines to alleviate symptoms. Close monitoring is essential, especially in cases where the condition is severe or recurrent, as it may require systemic treatment. Understanding the implications of herpes gestationis is crucial for obstetric care providers to ensure both maternal comfort and fetal safety.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from other skin conditions in pregnancy, such as pruritic urticarial papules and plaques of pregnancy (PUPPP).
  • Potential for misdiagnosis leading to inappropriate treatment.
  • Need for thorough documentation of symptoms and treatment response.
  • Variability in presentation and severity among patients.

Audit Risk Factors

  • Inadequate documentation of symptoms and treatment plans.
  • Failure to differentiate between herpes gestationis and other dermatological conditions.
  • Lack of follow-up documentation regarding the patient's response to treatment.
  • Misuse of related codes that do not accurately reflect the patient's condition.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed documentation of the patient's symptoms, treatment plans, and any complications that arise.

Common Clinical Scenarios

A pregnant patient presenting with severe itching and blistering lesions on the abdomen during the second trimester.

Billing Considerations

Consideration of the patient's overall health and any comorbid conditions that may complicate treatment.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive documentation of maternal-fetal interactions and any potential risks to the fetus.

Common Clinical Scenarios

Management of a high-risk pregnancy where herpes gestationis is present, requiring close monitoring.

Billing Considerations

Assessment of the impact of the condition on fetal development and delivery planning.

Coding Guidelines

Inclusion Criteria

Use O26.42 When
  • According to the official ICD
  • 10 coding guidelines, O26
  • 42 should be used when a patient presents with herpes gestationis specifically during the second trimester
  • Coders must ensure that the diagnosis is well
  • documented and that any associated symptoms or treatments are clearly noted

Exclusion Criteria

Do NOT use O26.42 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits for management of herpes gestationis during pregnancy.

Documentation Requirements

Documentation of symptoms, treatment response, and any changes in management.

Specialty Considerations

Obstetricians should ensure that all visits are well-documented to support the coding of O26.42.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like herpes gestationis, improving the accuracy of data collection and reimbursement processes. The granularity of ICD-10 codes helps in better tracking of maternal health outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like herpes gestationis, improving the accuracy of data collection and reimbursement processes. The granularity of ICD-10 codes helps in better tracking of maternal health outcomes.

Reimbursement & Billing Impact

reimbursement processes. The granularity of ICD-10 codes helps in better tracking of maternal health outcomes.

Resources

Clinical References

  • •
    American College of Obstetricians and Gynecologists (ACOG)

Coding & Billing References

  • •
    American College of Obstetricians and Gynecologists (ACOG)

Frequently Asked Questions

What is the significance of coding O26.42 accurately?

Accurate coding of O26.42 is crucial for ensuring appropriate management of herpes gestationis during pregnancy. It helps in tracking maternal health outcomes and ensuring that patients receive the necessary care and treatment.