Hemolytic Disease of Newborn Coding in ICD-10-CM

Accurate ICD-10-CM coding for hemolytic disease in newborns can be challenging. Code assignment is dependent on recognizing documentation that clearly establishes the presence of hemolytic disease versus clinical indications of the disease without a definitive confirmatory diagnosis. Understanding the pathophysiology underlying newborn hemolytic disease and the coding direction ICD-10-CM provides related to reporting of this condition and its related symptoms can help coders more adeptly decipher what is being expressed in the health record.

Please watch this presentation to learn about ICD-10-CM coding for hemolytic disease of newborn.

Take Aways

• Hemolysis is the destruction of red blood cells
• Isoimmunization occurs when incompatible blood types intermingle
• Isoimmunization is the main cause of hemolysis in newborns
• Isoimmunization in newborns is mainly caused by ABO and Rh factor blood group incompatibilities
• A direct Coombs test identifies maternal/fetal blood group incompatibilities
• A positive Coombs test is reported with R79.89 Other specified abnormal findings of blood chemistry
• Codes from category P09 are not appropriate for reporting a positive Coombs test

To find additional instruction in ICD-10-CM Coding for newborn conditions, explore the course Newborn Secondary Diagnosis Coding and Reporting on HIAlearn.com.

Take the Quiz

For detailed explanations of the quiz answers, please refer to the end of this blog post.

About the Series: Coding in the Real World with Cari

Coding in the Real World with Cari delivers focused, practical education built for how coding actually happens—not just how it’s written in guidelines. Each episode breaks down one coding topic at a time, using clear explanations and real-world scenarios to help coders apply concepts with confidence and accuracy.

Led by Cari Greenwood, RHIA, CCS, CPC, an AHIMA-approved ICD-10-CM/PCS trainer with more than twenty years of experience in health information management, the series draws on deep expertise across inpatient, outpatient, and professional fee coding and auditing. Cari’s background in education, client support, and curriculum development ensures each session is both technically sound and immediately applicable.

From complex diagnoses to nuanced documentation challenges, this series is designed to strengthen decision-making, reinforce compliance, and bridge the gap between guidance and real-world application.

Since 1992, HIA has been the leading provider of compliance audits, coding support services and clinical documentation audit services for hospitals, ambulatory surgery centers, physician groups and other healthcare entities. HIA offers PRN support as well as total outsource support.

The information contained in this coding advice is valid at the time of posting. Viewers are encouraged to research subsequent official guidance in the areas associated with the topic as they can change rapidly.