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ICD-10 Guide
ICD-10 CodesO36.0921

O36.0921

Billable

Maternal care for other rhesus isoimmunization, second trimester (fetus 1)

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

Code Description

ICD-10 O36.0921 is a billable code used to indicate a diagnosis of maternal care for other rhesus isoimmunization, second trimester (fetus 1).

Key Diagnostic Point:

Rhesus isoimmunization occurs when an Rh-negative mother produces antibodies against Rh-positive fetal blood cells, which can lead to hemolytic disease of the fetus and newborn (HDFN). During the second trimester, maternal care focuses on monitoring the fetus for complications such as fetal growth restriction, fetal distress, and anemia. Regular ultrasounds and Doppler studies are essential to assess fetal well-being and placental function. Maternal blood tests, including indirect Coombs tests, help evaluate the severity of isoimmunization. If fetal distress or significant growth restriction is detected, further interventions may be necessary, including possible intrauterine transfusions or early delivery. The management of rhesus isoimmunization requires a multidisciplinary approach, involving obstetricians, maternal-fetal medicine specialists, and pediatricians to ensure optimal outcomes for both mother and fetus.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Understanding of maternal-fetal blood group incompatibility
  • Need for regular monitoring and interpretation of fetal assessments
  • Coordination of care among multiple specialties
  • Documentation of maternal and fetal health status

Audit Risk Factors

  • Inadequate documentation of maternal blood type and antibody status
  • Failure to document fetal monitoring results
  • Lack of clear treatment plans for identified fetal issues
  • Misclassification of the severity of isoimmunization

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed records of maternal blood type, antibody screening results, and fetal monitoring outcomes.

Common Clinical Scenarios

Routine prenatal visits, management of fetal growth restriction, and monitoring for signs of fetal distress.

Billing Considerations

Ensure accurate coding of maternal and fetal conditions, especially when multiple fetuses are involved.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive documentation of high-risk factors, including maternal history and fetal assessments.

Common Clinical Scenarios

Management of pregnancies complicated by isoimmunization, including intrauterine transfusions.

Billing Considerations

Focus on the implications of isoimmunization on fetal health and the need for specialized interventions.

Coding Guidelines

Inclusion Criteria

Use O36.0921 When
  • Follow the official ICD
  • CM coding guidelines for obstetric conditions, ensuring accurate documentation of maternal and fetal health status, and adherence to the specific criteria for coding isoimmunization

Exclusion Criteria

Do NOT use O36.0921 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

76801CPT Code

Ultrasound, pregnant uterus, transabdominal, real-time with image documentation

Clinical Scenario

Used for routine monitoring of fetal growth and well-being in cases of isoimmunization.

Documentation Requirements

Document the reason for the ultrasound, findings, and any follow-up actions.

Specialty Considerations

Ensure that the ultrasound findings are clearly linked to the diagnosis of rhesus isoimmunization.

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, improving the ability to track and manage cases of rhesus isoimmunization and its complications.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the ability to track and manage cases of rhesus isoimmunization and its complications.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the ability to track and manage cases of rhesus isoimmunization and its complications.

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 O36.0921 accurately?

Accurate coding of O36.0921 is crucial for proper management of pregnancies affected by rhesus isoimmunization. It ensures that appropriate monitoring and interventions are provided, which can significantly impact fetal health outcomes.