What do subterms indicate in ICD-10-CM coding?

Subterms in ICD-10-CM coding serve to provide more detailed and specific information regarding the conditions being coded. They clarify aspects such as the precise location of a disease, the nature or type of the condition, or the underlying cause or etiology. This specificity is critical for accurate coding, as it enables healthcare providers to communicate the complexities of a patient's diagnosis with precision.

For instance, if a diagnosis involves a specific organ or region of the body, subterms help to identify that specific site. Similarly, if a condition is categorized by a certain type or characteristic, subterms assist in distinguishing between variations of the same general condition. This level of detail supports better patient care, research, and billing accuracy, ensuring that the healthcare services rendered are precisely matched with the services documented.