Final answer:
The diagnosis code is the first ICD-CM code to be placed on an insurance claim form to communicate the patient's medical condition to the insurer.
Step-by-step explanation:
When submitting an insurance claim, the diagnosis code from the International Classification of Diseases, Clinical Modification (ICD-CM) should be placed on the form first. This code informs the insurance company about the medical condition that has been diagnosed and treated. Medical professionals use diagnosis codes to report conditions to health management systems confirming treatments are aligned with the diagnosis, while medical billers process these codes for insurance claims.