What should ICD-10-CM codes indicate if an underlying condition and its manifestations are both present?

When coding for conditions in ICD-10-CM, it is essential to understand the importance of both underlying conditions and their manifestations. In situations where both are present, the coding guidelines specify that the underlying condition should be coded first. This is rooted in the principle that the underlying condition is the primary diagnosis that leads to the manifestation, which is a secondary condition resulting from the primary.

Coding the underlying condition first ensures that the healthcare claims accurately reflect the nature of the patient's health status and treatment approach. This helps in creating a clearer picture for healthcare providers, insurers, and researchers regarding the patient's medical history and the relationship between the primary and secondary conditions.

By adhering to this guidance, coders enhance the accuracy and integrity of medical coding, which is critical for proper reimbursement and maintaining comprehensive patient records. Overall, starting with the underlying condition reinforces the clinical significance of the diagnosis hierarchy in coding practices.