In the ICD-10-CM code book, the main term for the diagnosis "Tortuous aortic arch" would be:
- Aortic
The term "aortic" is the main term because it represents the primary focus of the diagnosis, which is the aorta, the main artery that carries blood from the heart to the rest of the body. In this case, the aorta is described as "tortuous," meaning it has abnormal twisting or curvature.
By identifying "aortic" as the main term, you can locate the specific code in the ICD-10-CM code book that corresponds to this diagnosis. This helps in accurately documenting and coding the condition for medical records and billing purposes.
