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ICD-10 Guide
ICD-10 CodesO31.21

O31.21

Billable

Continuing pregnancy after intrauterine death of one fetus or more, first trimester

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

Code Description

ICD-10 O31.21 is a billable code used to indicate a diagnosis of continuing pregnancy after intrauterine death of one fetus or more, first trimester.

Key Diagnostic Point:

This code is used to indicate a continuing pregnancy after the intrauterine death of one or more fetuses during the first trimester. In cases of multiple gestation, the loss of one fetus can lead to significant complications, including the risk of twin-to-twin transfusion syndrome (TTTS), where blood flow between the fetuses becomes imbalanced. This condition can result in one twin receiving too much blood while the other receives too little, leading to serious health issues for both. The management of such pregnancies requires careful monitoring and may involve interventions such as amnioreduction or laser therapy to correct the blood flow imbalance. Clinicians must document the status of the remaining viable fetus or fetuses, any interventions performed, and the ongoing management plan to ensure accurate coding and billing.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Differentiating between intrauterine death and other complications in multiple gestation.
  • Understanding the implications of twin-to-twin transfusion syndrome.
  • Documenting the clinical management of the remaining viable fetus or fetuses.
  • Navigating the emotional and psychological aspects of the loss for the patient.

Audit Risk Factors

  • Inadequate documentation of the intrauterine death.
  • Failure to document the management plan for the remaining fetus or fetuses.
  • Misclassification of the type of multiple gestation.
  • Lack of clarity regarding the interventions performed.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed documentation of fetal demise, ongoing pregnancy status, and management plans.

Common Clinical Scenarios

Management of pregnancies with intrauterine fetal demise, monitoring for complications in multiple gestation.

Billing Considerations

Consideration of psychological support for the patient and family, as well as the need for follow-up care.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive documentation of high-risk factors, including TTTS and other complications.

Common Clinical Scenarios

Management of high-risk pregnancies with intrauterine death and monitoring for TTTS.

Billing Considerations

Coordination of care among specialists and detailed tracking of fetal health.

Coding Guidelines

Inclusion Criteria

Use O31.21 When
  • Follow the official ICD
  • CM coding guidelines for obstetric conditions, ensuring that all relevant clinical details are documented
  • Specific criteria for multiple gestation and complications such as TTTS must be adhered to for accurate coding

Exclusion Criteria

Do NOT use O31.21 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

59000CPT Code

Ultrasound, pregnant uterus, transabdominal

Clinical Scenario

Used for monitoring the status of the remaining fetus in cases of intrauterine death.

Documentation Requirements

Document the reason for the ultrasound and findings related to the remaining fetus.

Specialty Considerations

Obstetricians should ensure that the ultrasound report includes details about the viability of the remaining fetus.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including the differentiation of complications arising from multiple gestation. This specificity aids in better tracking of outcomes and resource allocation in maternal-fetal medicine.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including the differentiation of complications arising from multiple gestation. This specificity aids in better tracking of outcomes and resource allocation in maternal-fetal medicine.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including the differentiation of complications arising from multiple gestation. This specificity aids in better tracking of outcomes and resource allocation in maternal-fetal medicine.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What documentation is required for coding O31.21?

Documentation must include the gestational age at the time of fetal demise, the status of the remaining fetus or fetuses, any complications such as TTTS, and the management plan. Detailed ultrasound findings and any interventions performed should also be documented.