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ICD-10 Guide
ICD-10 CodesO01.0

O01.0

Billable

Classical hydatidiform mole

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

Code Description

ICD-10 O01.0 is a billable code used to indicate a diagnosis of classical hydatidiform mole.

Key Diagnostic Point:

Classical hydatidiform mole, also known as a complete mole, is a type of gestational trophoblastic disease characterized by abnormal proliferation of trophoblastic tissue. This condition arises when an egg with no genetic material is fertilized by a sperm, leading to the formation of a mass of cysts instead of a viable pregnancy. Patients may present with symptoms such as vaginal bleeding, uterine enlargement, and elevated levels of human chorionic gonadotropin (HCG). The diagnosis is typically confirmed through ultrasound, which reveals a characteristic 'snowstorm' appearance of the uterus. Monitoring HCG levels is crucial, as persistently elevated levels can indicate the risk of developing choriocarcinoma, a malignant form of gestational trophoblastic neoplasia. Management often involves surgical intervention, such as dilation and curettage (D&C), followed by close HCG monitoring to ensure complete resolution of the molar tissue and to detect any potential malignant transformation early.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between complete and partial moles
  • Understanding the implications of HCG monitoring
  • Recognizing the risk of choriocarcinoma
  • Navigating the documentation requirements for surgical procedures

Audit Risk Factors

  • Inaccurate coding of HCG levels
  • Failure to document the type of mole
  • Omission of follow-up care details
  • Misinterpretation of ultrasound findings

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed documentation of symptoms, ultrasound findings, and HCG levels is essential for accurate coding.

Common Clinical Scenarios

Patients presenting with vaginal bleeding and elevated HCG levels requiring ultrasound evaluation.

Billing Considerations

Coders must ensure that all relevant clinical details are documented to support the diagnosis and any associated procedures.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive documentation of maternal and fetal health, including any complications arising from the mole.

Common Clinical Scenarios

Management of high-risk pregnancies due to molar gestation and monitoring for potential malignancy.

Billing Considerations

High-risk scenarios require meticulous documentation of all interventions and follow-up care.

Coding Guidelines

Inclusion Criteria

Use O01.0 When
  • Coders should adhere to official ICD
  • 10 coding guidelines, ensuring that all documentation supports the diagnosis of classical hydatidiform mole
  • This includes accurate recording of symptoms, diagnostic tests, and treatment plans

Exclusion Criteria

Do NOT use O01.0 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

58120CPT Code

Dilation and curettage (D&C)

Clinical Scenario

Performed for evacuation of a classical hydatidiform mole.

Documentation Requirements

Document indication for D&C, findings, and any complications.

Specialty Considerations

Obstetricians must ensure that all surgical details are accurately recorded.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of gestational trophoblastic diseases, improving the accuracy of diagnoses and treatment tracking for conditions like classical hydatidiform mole.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of gestational trophoblastic diseases, improving the accuracy of diagnoses and treatment tracking for conditions like classical hydatidiform mole.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of gestational trophoblastic diseases, improving the accuracy of diagnoses and treatment tracking for conditions like classical hydatidiform mole.

Resources

Clinical References

  • •
    Gestational Trophoblastic Disease: A Guide for Clinicians

Coding & Billing References

  • •
    Gestational Trophoblastic Disease: A Guide for Clinicians

Frequently Asked Questions

What are the risks associated with a classical hydatidiform mole?

Patients with a classical hydatidiform mole are at risk for developing choriocarcinoma, a malignant form of gestational trophoblastic disease. Regular monitoring of HCG levels is essential to detect any malignant transformation early.