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ICD-10 Guide
ICD-10 CodesChapter 15: Pregnancy, childbirth and the puerperiumO01

O01

Billable

Hydatidiform mole

Chapter 15:Pregnancy, childbirth and the puerperium

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

Code Description

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

Key Diagnostic Point:

Hydatidiform mole, also known as molar pregnancy, is a gestational trophoblastic disease characterized by abnormal growth of trophoblastic tissue, which can lead to the formation of a non-viable pregnancy. There are two types of hydatidiform moles: complete and partial. A complete mole occurs when an egg with no genetic material is fertilized, leading to the proliferation of placental tissue without fetal development. A partial mole involves the fertilization of a normal egg by two sperm, resulting in abnormal placental and fetal tissue. Patients may present with symptoms such as vaginal bleeding, excessive nausea and vomiting, and an enlarged uterus. Monitoring of human chorionic gonadotropin (HCG) levels is crucial, as elevated levels can indicate the presence of choriocarcinoma, a malignant form of gestational trophoblastic disease. Early diagnosis and management are essential to prevent complications and ensure appropriate follow-up care.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation between complete and partial moles
  • Monitoring and interpretation of HCG levels
  • Potential for malignant transformation (choriocarcinoma)
  • Need for thorough documentation of symptoms and treatment

Audit Risk Factors

  • Inaccurate coding of complete vs. partial mole
  • Failure to document HCG monitoring results
  • Omission of follow-up care details
  • Misinterpretation of symptoms leading to incorrect coding

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed documentation of symptoms, HCG levels, and treatment plans is essential for accurate coding.

Common Clinical Scenarios

Patients presenting with vaginal bleeding and elevated HCG levels, requiring ultrasound for diagnosis.

Billing Considerations

Coders must be aware of the potential for choriocarcinoma and ensure that all relevant clinical details are captured.

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 involving molar pregnancies and monitoring for malignancy.

Billing Considerations

High-risk factors must be documented, including previous molar pregnancies and family history of gestational trophoblastic disease.

Coding Guidelines

Inclusion Criteria

Use O01 When
  • Coders should follow official ICD
  • 10 guidelines for obstetric coding, ensuring that all relevant clinical details are documented, including the type of mole, HCG levels, and any complications

Exclusion Criteria

Do NOT use O01 When
No specific exclusions found.

Related CPT Codes

58150CPT Code

Dilation and curettage, aspiration curettage

Clinical Scenario

Used for surgical management of hydatidiform mole.

Documentation Requirements

Document indication for procedure and any complications.

Specialty Considerations

Obstetricians should ensure that the procedure is justified based on clinical findings.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of hydatidiform moles, improving the accuracy of diagnosis and treatment tracking.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of hydatidiform moles, improving the accuracy of diagnosis and treatment tracking.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of hydatidiform moles, improving the accuracy of diagnosis and treatment tracking.

Resources

Clinical References

  • •
    Gestational Trophoblastic Disease: A Guide for Patients and Families

Coding & Billing References

  • •
    Gestational Trophoblastic Disease: A Guide for Patients and Families

Frequently Asked Questions

What is the difference between complete and partial hydatidiform mole?

A complete hydatidiform mole occurs when an egg with no genetic material is fertilized, leading to abnormal placental tissue without fetal development. A partial mole involves fertilization of a normal egg by two sperm, resulting in both abnormal placental and some fetal tissue.